I came across this odd item at the thrift, thought it was a DIY kit at first, never heard of the outfit before, learn something new everyday.

http://www.grommesprecision.com/precisionelectronics/products/tunersreceivers/t115.htm

I did not grab it...

Long ago I worked in the electronics department of a theme park which was built in the late 60s. All the amplifiers for the park wide sound system were Grommes. They were very simple to work on, but very reliable amps. We had racks and racks of them.

I don't know anything more about them than this little bit.

Theres a Grommes Precision amp in this video. http://youtube.com/watch?v=Bp6X9ANhhVs

Seems like a nice amp