1936 RCA series "World" Tuning Knob

This knob has a diagram of the continents of the world on it with an overlay of longitude and latitude lines. I know this knob belongs on the C11-1 and I'm assuming that it also fits others in the "C" series from 1936. Also used on 1936 table sets in the "T" series such as the T10-1, T8-14, etc. Comes with a set screw. Fits on a 1/4" shaft.

Dimensions: 1-1/8” diameter, 5/8” tall, 1/4” hole