Zero to 100 in ten turns -[ HMM ]-

A multi-turn control knob on a Tektronix 465B oscilloscope. The knob, one inch (25.4mm) in diameter, operates a potentiometer (variable resistor) that requires ten full revolutions of irs shaft to cover its entire resistance range, allowing finer adjustment than a standard potentiometer with a ¾- to ⅞-turn range.

Done