[patmat2350]

A comment on wiring colors:

I found the section here in Shop Talk on this subject, and extracted:
(starting 1934-ish)
RED . . . . . . . . . Filaments and odd wires
BROWN . . . . . . . Cathodes and grounds
WHITE . . . . . . . . B+ and screens of output pentodes
WHITE w/BLACK tracer and/or BLACK w/WHITE tracer . . . . Plates
GREEN . . . . . . . . Grids and screen grids

Reality in my 1936/7-ish 655:

Tan: Both sides of the floating heater (filaments) circuit, and a bunch of other places including cathodes;
Brown (and black): Leads out of the transformer
White, and white with black tracer: LOOKS like tan! But closer inspection and the pic below show it's lighter than TAN and could have been white once!