[Arran]

Sometimes the schematic or a wiring diagram will tell you what the colours were even if they faded, you may not be able to get the exact period correct coloured wire that Philco used but you should be able to get something close. In my experience the part that is exposed will fade but if it's covered up it won't so much, like if it has an end that goes into an IF can or something. It is an old radio so something close is perfectly acceptable, for all you know the shade of green or red may have varied from whatever roll of wire they used from day to day. I don't know if the factory wire was always lacquered, some appears to be but in other cases the insulation is sort of loose, I think if the cloth looks sort of glossy then it was probably lacquered or varnished.
Regards
Arran