Unfortunately, there are no markings of any kind on the two amps. They are incredibly well constructed made out of 5mm sheet aluminum screwed together. There are two transformers either end of the chassis. The power transformer is a Hammond 278cx and the output transformer is also Hammond 1650t. Either side of the power transformer are banks of Four J J 100-100 500v capacitors. There are a total of 9 tube sockets 8 are the 8 pin octal as used with the 6550 tubes the other socket is a miniature 9 pin (12AT7 type base). Three sockets are either side of the output transformer and three between the two transformers.This may be a home made amp but the quality is remarkable if it is.
