It's called the Schwarzkopf and a bunch of watch guys do it, apparently that's a thing when you want to know the time in different time zones(or have too many watches and not enough hands) https://www.ablogtowatch.com/remembering-general-norman-schw...
They sell watches with time zone functionality, nice watches in fact. Rolex makes a few different models of the submariner with this functionality, so does Tudor.
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