When HN users recommended it
1 HN user recommended this in 2018, in one comment.
20072026
Each tall tick is one HN user's first recommendation. A short tick is the same user again. Click a tick to jump to the comment.
Easton Umpire Indicator
Amazon's catalog no longer lists this product (checked 2026-11-02). The name comes from the link HN users posted.
They're becoming less common, but mechanical automobile (and bicycle) odometers are little mechanical computers of a sort. Baseball and softball umpires (especially for rec leagues, not sure about professional games) often use a "clicker" (https://www.amazon.com/Easton-Umpire-Indicator/dp/B07BYX8XQL for example) to keep count of balls and strikes.