Mechanical knob turn counting dials.
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Some options online:
This beauty from SurplusSales.com:
https://diqn32j8nouaz.cloudfront.net...ing_dials1.jpg
They have a nice selection:
https://diqn32j8nouaz.cloudfront.net...ing_dials2.jpg
More: Knob counting dials at SurplusSales.com:
Some other sources:
https://www.mouser.com/Passive-Compo...q0yr?P=1yeyo6u
DC27FL-1/4 - ETI SYSTEMS - Turns Counting Dial, 10 Turns, 0.25 ", Black Finish, DC27 Series | Newark element14
Of course if you're feeling frisky you can make your own:
https://diqn32j8nouaz.cloudfront.net...als_plans1.jpg
https://diqn32j8nouaz.cloudfront.net...als_plans2.jpg
Previously: https://www.homemadetools.net/forum/...6452#post83701
