[Joe Rossi]

My 2 cents.  This is a Philco 40-155 based on the cabinet design over the speaker. It has been modified, evidenced in part because of the transformer.  It isn’t squarely on the chassis (hanging over the edge) and appears to be a replacement.  As 6V6’s aren’t part of the original tube line-up, someone wired in some octal sockets to sub for the 41’s and the 84. In fact, there were NO octal tubes in the tube line-up. Checking the components underneath and tracing the circuit would be the first step.