Here is a vintage or antique tube radio bakelite Knob, black, with a chrome 'bullet' center. 

Fits 3/16" split shaft. Has flat spring in center of hole. 

Measures 1-1/16" across top. 1-3/8" tall (1/2" top + 7/8" shaft extension). 

In excellent vintage condition.

SAME-DAY FREE USPS FIRST CLASS SHIPPING WITHIN USA. 

See my other listings for more vintage or antique knobs!

(stock location ref.130)