I have continued to work on various WW2 radios.  I mostly went down this rabbit hole because the T24 Weasel came factory equipped with an extremely rare radio. Once you start paying attention, it is hard not to find them fascinating. 

This is part of a BC-659 chassis.  The reason everything looks golden is because the entire radio was "fungus/moisture proofed". The Signal Corps would paint these radios with varnish (that had arsenic mixed in) to keep them from molding up and failing in high humidity environments.  Not all WW2 radios are so treated. 

The varnish does a great job of protecting everything but you do have to be careful when you go to repair the radio because heating varnish/arsenic is not good for your health.