AMPHENOL D221 COUNTING DIAL for 1/4 inch shaft. Counting Dial Knob Only.

The Amphenol D221 Counting Dial (also known as the Amphenol Tuchel Microdial D-221) is an all-metal, 10-turn precision dial designed for use with potentiometers, offering a clear visual display of shaft rotation.
Type: A 10-turn counting dial with a numerical display.
Counting Range: Displays rotations from 0 to 10 turns, and features a readout from 000 to 999 for precise positioning.
Material: Constructed with all-metal components for durability, typically featuring a black enamel housing with a die-cast zinc housing and mounting plate.
Dimensions: Has an approximate outside diameter of 1.75" (or 1.816" per some sources) and is approximately 1.25" (or 1.660" deep) high.
Shaft Compatibility: Designed to fit a standard 1/4" diameter shaft.
Readability: Features large, easy-to-read, contrasting numerals with a convex window lens, which provides wide-angle viewing and readability from a distance.
Mechanism: Boasts a precision design with a finger-tip positive action brake and zero backlash for accurate adjustments.