Philco rosette style knobs used on many cathedral and console radios.
Models: 21, 70, 90 cathedrals
Dimensions:
Small - 11/16" base diameter, 1/2" tall.
Medium - 7/8" diameter, 5/8" tall
Large - 1-1/8" diameter, 5/8" tall
All knobs fit 1/4" flatted shaft.