Completely unrelated, my boss has the clock in your image. My favorite prank of all time was all thanks to that clock.
It’s essentially 24 hours and you can only adjust it by rotating forward (so you can’t change it from 12:05 to 12:01 other than clicking through 23 hours and 56 minutes of those).
Every day, I’d go in and click it 1–3 minutes forward without him knowing. It lasted over a year.