RT-707............XI9300798
MA-62A...........XJ13015250
SX-1980..........XL3400103S
RT-1011L.........YE1305328
DT-400............ZI3103593
PL-L1000.........AG24319T
CT-F750..........AH9319720
SG-9800..........AL9805846K
I didn't know my rt-707 was older than my rt-1011L