A friend of mine found this amp in his deceased uncles garage. He brought it to me to check it out. Is there anyone here that's familiar with this amps circuit? I can't seem to find the proper schematic. I have some questions if anyone could answer them. This thing is in MARVELOUS clean condition. I'm the first one in 75 years to take the chassis out. Any help would be greatly appreciated. (he said it worked but he was scared to run it too long without being checked out) It has the original 12" Rola speaker. The OT is not on the speaker, it's in the chassis. Bone stock and all original including tubes. It's pencil dated inside to January 1946. No model number that I could find.