Hi, I have a Fosgate The Punch Model
PR-2100 Type II ( Fosgate Electronics Inc. pre Rockford), also, a Fosgate The Punch
PR 250 (pre Rockford) and Rockford Fosgate 5 band EQ (
PR 22IE I think, its hard to read the engraving on the top of the unit, lol!) I am pretty sure the amps are from 1979 and 1980 and the eq is from 1980 as well. I got them from one of my uncles who bought them new way back then and then gave them to me a few years ago. I have to check to see if they work though.