View Full Version : Pioneer Dates of Manufacture


Dr. Strangelove
01-10-2006, 03:41 PM
To determine the date of manufacture of your Pioneer component, look at the serial number. The first two characters will give you the year and month of manufacture. The first letter is the year, the second letter is the month. For example, taking into consideration the age of the equipment:

ZA would be 1979, January
YL would be 1978, December
KK would be 1964, November


1st 2nd
Char Year Year Char Month

A 1954 1980 A January
B 1955 1981 B February
C 1956 1982 C March
D 1957 1983 D April
E 1958 1984 E May
F 1959 1985 F June
G 1960 1986 G July
H 1961 1987 H August
I 1962 1988 I September
J 1963 1989 J October
K 1964 1990 K November
L 1965 1991 L December
M 1966 1992
N 1967 1993
O 1968 1994
P 1969 1995
Q 1970 1996
R 1971 1997
S 1972 1998
T 1973 1999
U 1974 2000
V 1975
W 1976
X 1977
Y 1978
Z 1979


It appears that Pioneer began coding the year in 2001 as follows:

A 2001
B 2002
C 2003
D 2004
E 2005
F 2006
G 2007
H 2008
I 2009

Not all Pioneer components followed this rule. For example, the Pioneer SE-700 headphones had a two letter prefix, but did not follow the table above. For these components, it is rumored they were made by another company, possibly Azden or Stax, for Pioneer.

But, generally speaking, most all of Pioneer's components from 1954 followed this table.

Doc

axel
01-10-2006, 03:49 PM
Thanks Doc for this!

It reminds me of the (my) Hasselblad cameras and their similar 2-letter prefix... I sure wish Sony and Kenwood were as crystal clear as those :D

Dr. Strangelove
01-10-2006, 03:52 PM
I figured it would be helpful.

Maybe we can get Retro Stereo to make it a sticky.

Thanks,
Doc

Unican_Eric
01-10-2006, 04:10 PM
Thank you very much. I needed this. :thmbsp:

Mark W.
01-10-2006, 04:20 PM
Canon Cameras from the early 60's through at least 1986 used a very simular Build Code stamped in black ink on the balck surface where the film cassette goes. The date coding is different then Pioneers but the format is exactly the same.

THANKS DOC. Glad you wandered back here try not to get lost again OK?

axel
01-11-2006, 04:52 AM
So my PD-1 was made in february, 1983: DB8403115
As I very much doubt Pioneer made 8.403.115 P-D1s, would the "84" here stand for product id?

Dr. Strangelove
01-11-2006, 06:10 AM
The numbers following the first two letters are somewhat of a mystery. I have looked at these to determine a pattern. I am convinced there is a pattern, however the number does not indicate the number of units made. Well, at least without understanding the full number. It seems that the number may include a "family" or group, and a sequential numbering of components produced in that group, which may have included other components. Sounds complicated, right?

Let's pick on two components that I previously owned:

SA-6700 Stereo Amplifier 40wpc YA 3606248F
TX-6700 FM/AM Stereo Tuner YD 3606479M

These two components were from January and April of 1978.

Notice that both numbers begin with 3606, yet they are entirely different components. And, the 3606 prefix occurs in other components from around the same year. This coincidence seems to happen with great regularity across the component lines, especially when the year and month are relatively close. It may be nothing more than just a sequential numbering of components, and the luck of the draw when the inspector grabs a tag from a string of tags. Also, has anyone noticed how the serial tags changed (paper, aluminum w/screws, aluminum w/plastic fasteners, etc)?

Any ideas?

Doc

axel
01-11-2006, 06:20 AM
hey Sherlock!
so "8403" would be a production id (lineup #84, 3rd month into production for instance?) and "115" the... serial number itself?

Dr. Strangelove
01-11-2006, 06:41 AM
Sounds plausible. If we had a larger collection of serial numbers, and model numbers, we might be able to solve this mystery, Mr. Watson. Regarding your last 3 digits (115), and my two examples (248F, 479M), I have also observed that a letter may or may not follow these last 3 digits.

Does anyone have a friend/contact at Pioneer, in Japan, that can help? I had put the issue of the number itself aside for the past couple of years. Now that Axel has addressed it, I will consume all of my time, not leaving my office, ignoring my wife and family, allowing my grooming standards (such as they were) to decline, until this mystery is solved.

Doc

Dr. Strangelove
01-11-2006, 07:12 AM
Damn you, Watson!! Now I am focused on this again. Here is a list of models and serial numbers of some of my components (past and present) plus Axel's P-D1, in order by date code:



Model Serial Date Code
MXA-1 IF 74834 Jun-62
SM-Q300 IF 75952 Jun-62
SD-1100 TH 1000617 Aug-73
SA-6700 YA 3606248F Jan-78
TX-6700 YD 3606479M Apr-78
SE-700 MA 7438 Aug-78 (**)
CT-F1250 ZE 3600464 May-79
TX-9800 ZE 3605139 Jul-79
PL-600 ZG 13562 Jul-79
SA-9800 ZL 3602950M Dec-79
HPM-700 AJ 11007U Oct-80
DT-500 AJ 2604970U Oct-80
DT-500 AJ 2912441S Oct-80
HPM-700 AK 14374U Nov-80
DT-500 BB 2921042S Feb-81
HPM-700 BC 06303 Mar-81
HPM-700 BC 06324 Mar-81
SG-9800 BC 3614862K Mar-81
RG-2 BE 3611780K May-81
RT-909 BE 3612002 May-81
U-24 BG 1006819M Jul-81
P-D1 DB 8403115 Feb-83 (Axel)
P-D70 EG 3607074T Jul-84


** The SE-700 do not conform to the Year/Month convention. I just happen to know when this particular SE-700 was manufactured. Also, both Azden and Stax have denied being the manufacturer of these headphones.

Anyone see a pattern? Look at the two DT-500s (both from Oct 1980). Hard to see a pattern there. We can come up with theories, but without more data, we would be merely guessing at how the numbers were derived.

Doc

axel
01-11-2006, 07:16 AM
Don't.

I only had my P-D1 in mind when I wandered the above - a maximum of 999 P-D1s produced sound quite plausible (way less than that anyway) but I'm sure there was much more than 999 SA-6700s and TX-6700s produced... Was there?

Dr. Strangelove
01-11-2006, 07:20 AM
I am sure there were more than 999 of the SA and TX 6700s produced. I agree with you, however, on the limited production of the P-D1.

One thing that could help is if Pioneer kept production records for the numbers of components produced by year, or total production of a specific component.

Doc

axel
01-11-2006, 08:24 AM
That would help indeed. Would even wipe the work from under our feet :D

Unfortunately, I believe Pioneer to act like Kenwood, Luxman or Sony - 100% mute. Which doesn't mean they haven't kept records but actually reaching them and letting us disclose the info is quite high an expectation.

foetusized
01-11-2006, 02:13 PM
I need to record my serial numbers anyway; I'll check my Pioneer gear when I get home. I got a set of Pioneer 'phones from my secret santa; any ideas where to look for a number?

240 Volts
01-11-2006, 02:49 PM
Just out of interest :boring: - on most of my Pioneer cassette decks there is a date of manufacture label on the motors which corresponds very well with the method outlined by Dr. Strangelove. :thmbsp:

For example on my CT-F1000, serial number XK 9301388, the capstan motor is dated 05-Sep-77 and the reel motor 30-Sep-77. The XK serial number would make the date of manufacture of the deck sometime in November 1977, i.e. a couple of months after the motors. This sounds about right to me, the motors would not be on the shelves for too long before being used.

I wonder if dating the motors was just a Pioneer thing or if other manufacturers did the same - if so then perhaps it could be the key to decoding their serial number system. :scratch2:

- Richard B.

Dr. Strangelove
01-11-2006, 02:57 PM
I need to record my serial numbers anyway; I'll check my Pioneer gear when I get home. I got a set of Pioneer 'phones from my secret santa; any ideas where to look for a number?

On my SE-700s, the number is on the inside of the left slider that goes into the headband.

Doc

foetusized
01-11-2006, 05:56 PM
Here's what I found on my Pioneers:

A-27: YJ2900713M
SA-9800: ZK2602896M
TX-9800: ZK2601977M
SA-608: AD2905928D
TX-610: AK3602207Y
SA-610: AI3606106F
DT-500: BA2919312S
SA-510: BI3625315F
DT-510: BI2907746G

I can't find a SN on the SE-L40 cans, and the one on my RG-2 is unreadable.

Mark W.
01-11-2006, 07:01 PM
foetusized How many of those Pioneers have the <EP> mark on the back that tells you to thanks a Soldier, Sailor, or Marine for buying it the first time.

The <EP> mark means the unit was sold through a US government military store a Post Exchange or Navy Exchange.

All of my Pioneer units except the newer CD players have this mark. That's 10 units out of 10 units (if you count my HPM-100's) with the <EP> mark (I'm not counting the Newer CD players as they aren't even close to vintage. Bought from CL, Ebay, and a friend.

foetusized
01-11-2006, 08:55 PM
All of the items I listed above (including the RG-2 but not the cans) have the <EP> mark, except for the TX-610 tuner. The TX-610 is also the only one of the bunch that was made in Korea instead of Japan.

[edit] I also have a PD-F907 CD changer with a serial number that starts SJ, and says it was manufactured in October 1998 above the serial number. No <EP> mark.

siamac
01-12-2006, 04:48 PM
Pioneer SR-202 - QH 66764
Pioneer SC-700 - QH 13451
Pioneer SM-700 - RD 15891

http://img265.imageshack.us/img265/304/scsm7007ve.jpg

tankdonovan
01-18-2006, 07:42 PM
All this time I thought that this thread on AK was the right way to tell Pioneer dates. Seems I may have been a year off or was I?

http://audiokarma.org/forums/showthread.php?t=4141&highlight=pioneer+serial


Someone is wrong!

Any ideas?

Tank

Dr. Strangelove
01-18-2006, 07:49 PM
The Pioneer Spec Bible had the table off by one year. This has been corrected in the latest version of the bible, and the table in this thread.

Edit: The Pioneer Spec Bible now uses this table:
http://www.stereomanuals.com/reference/pioneer_dates.htm

Doc

tankdonovan
01-18-2006, 08:14 PM
So, all my gear is a year older than I thought!
I can live with that.
Thanks
Tank

nesticle
01-19-2006, 03:59 PM
My SX-650 is WG

.... yeah July '76 sounds about right. This is a great topic!

wesley1959
01-26-2006, 12:55 PM
Cool, My SX-1050 was one of the first ones then. Manufactured in August of 77.
Thanks for the info!

siamac
01-26-2006, 01:05 PM
Cool, My SX-1050 was one of the first ones then. Manufactured in August of 77.
Thanks for the info!
:scratch2: :scratch2: :scratch2:

SX-1050 started in 1976.
My SX-1050 has the Number. WI2900637M (E-P)
So it was build September 1976

wesley1959
01-26-2006, 01:17 PM
Ahhhh so mine was in about the middle of the build cycle. Still cool LOL !
XH3624861S

Laemmle
02-26-2006, 06:25 PM
Just checked the serial number on my SX-828..have not looked that close since I purchased it new!

I just learned that the unit was made July, 1973.
SG-3807625.

Laemmle
02-27-2006, 06:32 AM
OK Strangelove,

How does one determine how many of the model were manufactured?

NYC minds want to know!

Dr. Strangelove
02-27-2006, 08:34 AM
That would be some good information to have. I imagine that Pioneer may have kept such records, but finding who to contact might be an impossible task.

I have thought that if one understood the serial number formats, and had enough serial numbers, the production numbers might be derived.

Doc

siamac
03-07-2006, 05:58 PM
PD-7050 = HD 840 4935T
PD-6030 = GE 840 4423
CT-443 = IL 840 1039N
PD-5010 = FK 840 9472
PD-6100 = II8411713N
PD-7010 = GA290716O
F-90 = EJ9102387S
PL-2 = BF19063F
TX-606 = YG8420511M
TX-D1000 = AB9402357M
CA-100 = DD9800143S

urbain
04-17-2006, 10:51 AM
SL-450 (Euro version of the SX-450): WJ8400469S (October 1976)

SA-9500 II: XC2600628S (March 1977)

SA-9900: WD9302953M (April 1976)

:yes:

birddog
05-04-2006, 02:59 PM
Anyone know when the start of production was for the SX-1250? The one I just got was bulit in September of '76... :scratch2:

ztenlund
05-04-2006, 03:34 PM
Dr. Strangelove:
Remember that you asked me about the serial# of my HPM-60's?
Well they actually conform more than you might think at a first glance as I found out today.

When you asked I looked at the first two letters which were MM...
Well, when this thread surfaced today I went and had a second look and MM is followed by YH which conforms better to the probable date of manufacture.
So it begins MM - YH

Dr. Strangelove
08-21-2006, 08:41 AM
Yes, YH looks correct.

Doc

Family_Dog
09-08-2006, 06:14 AM
This is a very interesting thread. That would mean that my FM-B101 (S/N JL 13112) was manufactured in Decmber, 1963. And it still works - with the original 8v Dial lamps! :)

-Eric

Family_Dog
09-23-2006, 06:15 AM
Pioneer SX-737, 110v Model, but somehow crept into 230v land.

Serial #: WA3954868T, which makes it January 1976 model.

Dr. Strangelove
10-05-2006, 05:14 AM
This is a very interesting thread. That would mean that my FM-B101 (S/N JL 13112) was manufactured in Decmber, 1963. And it still works - with the original 8v Dial lamps! :)

-Eric
Eric, sorry I missed your post.

From a 1965 catalog, here is the FM-B101:

Doc

Family_Dog
10-05-2006, 09:59 AM
Eric, sorry I missed your post.

From a 1965 catalog, here is the FM-B101:

Doc

Aaah, but you did help me! You were very helpful with the schematic and I was able to send some photographs of a beautifully working unit in exchange for your kindness :)

This tubed mono unit simply sounds GREAT!

F_D

Dr. Strangelove
10-05-2006, 10:56 AM
You know, entering those advanced years is causing numerous problems for me. It looks like I can add memory loss to the list now.

But, I did not have the catalog photos published, so the net result is good.

Doc

YamahaFreak
11-12-2006, 07:16 PM
Does anyone know of a method to tell the age of Yamaha components? :scratch2:

VU Meter
02-24-2007, 07:13 PM
Anyone know when the start of production was for the SX-1250? The one I just got was bulit in September of '76... :scratch2:

Don't know, but mine was built 10/76.

fede_vr
03-28-2007, 07:00 AM
just checked my "new" Pioneer gears and found out that both the PL-620 and the SA-510 have the diamond with the EP mark on them..
Serials are :
PL-620 : BE 139145 that reads as May 1981
SA-510: AH 9431372F that make it a August 1980 one
DrSL : lots of +K for the great job on this site.
Greets, Federico...

Dr. Strangelove
03-28-2007, 07:37 AM
Anyone know when the start of production was for the SX-1250? The one I just got was bulit in September of '76... :scratch2:

The SX-1250 ran from 1975 to 1978.

Doc

dotnetpete
04-08-2007, 06:39 PM
To determine the date of manufacture of your Pioneer component, look at the serial number. The first two characters will give you the year and month of manufacture. The first letter is the year, the second letter is the month........Doc

Thanks for the chart, Doc. I have an SX 535 that I wanted to date...very interesting. It's a VE..., so May 1975.

Pete.

LesB
04-22-2007, 08:40 AM
For what it's worth:

TX840............DH3607571M
SA1040..........DH3603433S

Aluminum tags with aluminum rivets.

I bought this "matched set" on ebay. I assume they were originally purchased together. From the list above it would seem to be 1983.

Dr. Strangelove
04-22-2007, 08:45 AM
Thanks for the info.

Doc

LesB
04-22-2007, 09:39 AM
[QUOTE= Also, has anyone noticed how the serial tags changed (paper, aluminum w/screws, aluminum w/plastic fasteners, etc)?

Any ideas?

Doc[/QUOTE]

Just checked my two SX D5000's.

Wood sides, paper sticker for ser# AG2902054S.

Metal sides, alum plate, alum rivets for ser# AF3600343S.

The rest:

TX9800 paper ser#........ZG2902195M
TX9500 foil ser#.........WG2705635W
TX8100 power plate ser#..UF1601791M
TX6500II alum ser#.........YK3636047M

SX1500TD power plate ser#..OJ 44409
SX1080 paper ser#........YI2904021
SX750 alum ser#.........YC3682129S

SA7700 alum ser#.........YA3603034D

CT-F9191 power plate ser#..WE3618483

Aluminums have alum rivets, power plates have screws.

LesB

Dr. Strangelove
04-27-2007, 01:03 AM
I have noticed that some of the various tag styles were used at the same time.

Doc

JHS2RT
07-10-2007, 12:17 AM
Finally look at my Pioneer SX 1250 serial # and it was built in Dec 1977 -----must of been one of the last. They were built from 1976 - 1978.

The number is XL3630569S ----- anyone out there know how to decode the rest of the numbers.
Thanks James

zenith2134
09-21-2007, 10:38 AM
Thought I'd add my 'new' sx-1050 receiver. This one says VK3900080M

Now according to the chart this means November 1975. Thought these came out in '76? Made in Japan of course. Thanks for any info on this.

Steve 1050
12-02-2007, 12:54 AM
Here,s one for ya; no serial no. on my SX 1050. I've looked and there is no serial no. on my reciever, no tag, nofoil sticker, nothing!

jbrainey
12-02-2007, 01:02 AM
Here,s one for ya; no serial no. on my SX 1050. I've looked and there is no serial no. on my reciever, no tag, nofoil sticker, nothing!

Well...I wonder why someone would remove a serial number? :scratch2:

Steve 1050
12-02-2007, 01:52 AM
Odd to me also, however as this unit os over 30 yrs old I'm not really suprised. Things happen. BTW I purchased this at a "Flea Market" for 30 Bucks.

jimbofish
02-09-2008, 01:36 PM
Anyone see a pattern? Look at the two DT-500s (both from Oct 1980). Hard to see a pattern there. We can come up with theories, but without more data, we would be merely guessing at how the numbers were derived.

Doc

Now that you've got a sizeable amount of numbers, you could enter those numbers into a spreadsheet and then do some sorts and filters. If there is a method to the numbering system, it should show up.

jgmacv
02-18-2008, 08:24 PM
I've checked all my gear and all have the <EP> mark also (lone one being the PD-7010 CD player). I was in the Air Force from 79-90, so I'm wondering if any civilians were buying pioneer gear in the 70s - early 80s?

Cool_Manchu
03-11-2008, 01:11 PM
First and foremost, thank you Dr. Strangelove for providing the information for us to find out the date of manufacture of our Pioneer rigs.

I have an SX-1250 and my serial number is WA3901390M

Given this, I realized that my SX-1250 was made in January of 1976. So I guess I have one of the first ones off of the line.

MHJB
06-22-2008, 08:27 PM
I am new to this forum and grateful to have the opprtunity to access it's broad resources.

I recently bought a pair of Pioneer CS63dx speakers. One serial # starts with TA-WE (assume this one was made in 1973) and the other one is NA-WA. Is it safe to assume that one starting with NA was made in 1967 or was it made by another company as mentioned by Dr Stranglove in the the quote below?

Please let me know & thanks for any replies.

MHJB

To determine the date of manufacture of your Pioneer component, look at the serial number. The first two characters will give you the year and month of manufacture. The first letter is the year, the second letter is the month. For example, taking into consideration the age of the equipment:

ZA would be 1979, January
YL would be 1978, December
KK would be 1964, November


1st 2nd
Char Year Year Char Month

A 1954 1980 A January
B 1955 1981 B February
C 1956 1982 C March
D 1957 1983 D April
E 1958 1984 E May
F 1959 1985 F June
G 1960 1986 G July
H 1961 1987 H August
I 1962 1988 I September
J 1963 1989 J October
K 1964 1990 K November
L 1965 1991 L December
M 1966 1992
N 1967 1993
O 1968 1994
P 1969 1995
Q 1970 1996
R 1971 1997
S 1972 1998
T 1973 1999
U 1974 2000
V 1975 2001
W 1976 2002
X 1977 2003
Y 1978 2004
Z 1979 2005


Not all Pioneer components followed this rule. For example, the Pioneer SE-700 headphones had a two letter prefix, but did not follow the table above. For these components, it is rumored they were made by another company, possibly Azden or Stax, for Pioneer.

But, generally speaking, most all of Pioneer's components from 1954 followed this table.

Doc

relaximus
09-17-2008, 08:49 AM
Dr. Strangelove:

Thanks for putting this together! My limited contribution:
SX-1000TW | QI 51636 | Sept. '70

SX-680 | YF 3603031Y | June '78
Dave

fferraz
09-20-2008, 08:52 PM
Thanks a lot for this post... it's helped me determine the year and month of production of my Pioneer PL-707 TurnTable

Serial Number: EA 17191 H so January 1984, right? :D

gthang
04-03-2009, 01:44 PM
Just seen this thread, my PL-518 is from September 1978. :thmbsp:

avstooge
09-22-2009, 12:02 PM
To determine the date of manufacture of your Pioneer component, look at the serial number. The first two characters will give you the year and month of manufacture. The first letter is the year, the second letter is the month. For example, taking into consideration the age of the equipment:

ZA would be 1979, January
YL would be 1978, December
KK would be 1964, November


1st 2nd
Char Year Year Char Month

A 1954 1980 A January
B 1955 1981 B February
C 1956 1982 C March
D 1957 1983 D April
E 1958 1984 E May
F 1959 1985 F June
G 1960 1986 G July
H 1961 1987 H August
I 1962 1988 I September
J 1963 1989 J October
K 1964 1990 K November
L 1965 1991 L December
M 1966 1992
N 1967 1993
O 1968 1994
P 1969 1995
Q 1970 1996
R 1971 1997
S 1972 1998
T 1973 1999
U 1974 2000
V 1975 2001
W 1976 2002
X 1977 2003
Y 1978 2004
Z 1979 2005


Not all Pioneer components followed this rule. For example, the Pioneer SE-700 headphones had a two letter prefix, but did not follow the table above. For these components, it is rumored they were made by another company, possibly Azden or Stax, for Pioneer.

But, generally speaking, most all of Pioneer's components from 1954 followed this table.

Doc

I have two components that do not follow this chart.

DV-79AVi s/n = EIMP000215CC (was manufactured in Sept, 2005)
VSX-59TXi s/n = DBNN001030CC (was manufactured in Feb 2004, I think)

I will post the rest of my Pioneer s/n's as soon as I finish collecting them.

Dr. Strangelove
09-22-2009, 12:23 PM
Yes, Pioneer has started moving away from the chart. The good news is that they are putting the year and month on the sticker.

It does look like Pioneer went to:

2001 A
2002 B
2003 C
2004 D
2005 E

The month is still correct.

However, 2004 and 2005 are hardly vintage components, eh?<g>

I will update the chart...

Doc

avstooge
09-22-2009, 12:29 PM
Here are the rest of my Pioneer S/N's:

GR-777 s/n = OK3910742C
CS-705 s/n = FC01746V
CS-705 s/n = FC01743V
SX-626 s/n = TD3733946

I believe all of these do follow the chart for manufacturing dates.

Note that the components in my previous email that do not follow the chart are Pioneer Elite components. Do the Elite products follow a different numbering scheme perhaps?

avstooge
09-22-2009, 12:34 PM
Yes, Pioneer has started moving away from the chart. The good news is that they are putting the year and month on the sticker.

However, 2004 and 2005 are hardly vintage components, eh?<g>

I will update the chart...

Doc


Not too old yet (only 4 or 5 years), but they have now been replaced with new Pioneer flagships and are no longer readily available via authorized dealers.

My other post had all of my "vintage" stuff listed, and please note ALL are still in service and problem-free.

shankar
10-16-2009, 04:24 AM
I am thankfull for your single minded devotion to maintain records,Even Pioneer does not maintain such records, You are doing a great job,I salute you with my heart
Bhandarkar

SX-1010
02-11-2010, 12:16 PM
The productiondates on my components

CT-F 7171 . 1975 march. VC

SX-1010. 1974 sep. UI

NealinNevada
03-10-2010, 04:22 PM
I've got a few:

http://nlemerise.fileave.com/Pioneer/PIONEER4.jpg

indyhawg
05-31-2010, 04:52 PM
SX-1250- February 1976.

K7SSC
06-20-2010, 03:48 AM
4ch reciever QX-646 sn# TG1202090 <EP> (July '73)
Reverb SR-202 sn# OF59537 (June '68)

Zygmo
11-16-2010, 08:58 PM
Pioneer RtR RT707 SN CH9319745. Sorry...this is all I have.

oldsansui
09-16-2011, 01:36 AM
Pioneer SX-5570 = WD*
1976, April :thmbsp:

Thanks for the info.

zebra03
11-04-2012, 08:16 AM
HPM150's - August 1977

Thanks Doc , where ever you are . :music:

BocaJettyRat
11-13-2012, 10:54 AM
I just picked up a July of 1972 Pioneer SX-727 for 34$ thanks for the serial numbers information.