Here is a vintage or antique tube radio plaskon Knob, Ivory color with Brass Center. Fits 3/16" half-round shaft, has flat-spring for retention. 

Measures 1" across, 5/8" tall.

In very good vintage condition (needs cleaning).

SAME-DAY FREE USPS FIRST CLASS SHIPPING WITHIN USA. 

See my other listings for more vintage or antique knobs!

(stock location ref.18)