Vintage Centralab (CRL) 1486 rotary switch featuring a 21-pole, 3-position shorting contact configuration built on phenolic wafer sections. Designed for vintage radio chassis installations and specialized audio equipment, this switch features a 1-1/2 inch broad base housing and a 1-1/2 inch shaft length with a 3/8 inch shaft flat section for set-screw knob securing. It utilizes a standard 1/4 inch round shaft profile, suitable for complex band selection, signal routing, and multi-circuit switching applications in antique radio restoration.