Thanks for your help with this. It seems to be a Motorola amp that had the OPTs repositioned.
I spoke to the seller today and told him I’d pass. As cool as this could be, I have too many projects waiting for me to get to them and do not need another. He understood. Seems like a good guy. The amp came from a house he helped clean out, I believe for the owner.
If you’re interested, search Boston Craig’s List for the description below. I can’t post a link here.
VACUUM TUBE AMP FOR SALE - $149 (boxboro,mass)