Add to Cart Quick view Collins USED Original Band Card Selector Knob for the KWM-2 / 2A or the 51S-1 Zero Set Control Collins MSRP: Now: $16.99 Was: This Collins USED Original Band Card Selector Knob for the KWM-2 / 2A or the 51S-1 Zero Set Control is hard to find when you need one! This has the original Bristol set screw, and will work with a 1/4 round shaft. I have only a limited small... MSRP: Now: $16.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $16.99 Was: Subtotal: Add to Cart