Doubt it's a Sinn at all, since Sinn is a German company based in Frankfurt am Main, and its watches are not made in Switzerland.
I am Dyslexia of Borg. Futility is resistant. Your ass will be laminated.
Hmm, looks like decimal sub minutes.
Is it similar to this Sinn stoppuhr?
photo credit: Karakaan
They are called centiminutes (as in 1/100th of a minute). The subdial shown on the left is hours too (it is a 12-hr stopwatch, graduated in centiminutes)
An entirely fabricated measure intended to ease computations by dividing a minute into 100 units and not 60, something that is irrelevant now that calculations are all mechanised (as indeed are most timing measures).
These are complicated stopwatches, with split seconds (the red second hand can be independently stopped to record a time and then returned to catch up with the other second hand, and flyback, to restart without stopping. All recording centiminutes, minutes and up to 12 hrs. Note that the centiminutes are not graduated into fractions, this is because the movement runs in normal Hz speed (I think 18000bph), fractions of a second (1/5ths). So the hands do not advance in convenient fractions of centiminutes, they advance in 1/3 of a centiminute steps (1/5 of a 1/60 = 1/300 = 1/3 of a centiminute)
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