[Radioroslyn]

Philco chassis from 1939-42 model yrs have rubber wire. The exception is sets made in Canada .Most of the '37 and '38 models have a rf subchassis that makes components replacement difficult without it's removal. '28-'36 are pretty standard to repair but sometimes you'll find a open coil or two along w/ the cap and resistor replacement. Two other major players come to mind AK and Zenith lots of rubber wire.