This RL Drake C-Line Main Tuning Spinner Knob for R-4C , T-4XC, RV-4C,TR-4, and TR-4C, is BRAND NEW!NOTE: This listing is for just the tuning knob and not the aluminum Skirt which is a separate piece.This Original tuning knob has a free turning finger divot which makes it easy to spin the tuning dial! (not like some glued on aftermarket divots) Several years ago my company purchased much of RL Drake's Parts inventory and these knobs are original RL Drake knobs!This knob will also fit other Drake radios like the B-Line which did not have a main tuning knob with the finger divot like the C-Line. The newer C-Line tuning knob is much nicer to use. This knob is 1 3/4 inch in diameter and 13/16 inch high. This knob will fit a 1/4 inch shaft This Main Tuning knob is VERY hard to find so do not let this one get away!