Metric vs. other measurement systems - chart

[DIYSwede]

Scored one of these odd looking things in a flea market in Moscow 1992:



Raketa #2623 , 24h "Submariner's watch" with major time zone cities marked on a rotatable inner ring.
Haven't used it since the nineties, as the glass cracked and I've not yet gotten around switching it...
Guess Marv would call it a "Tetravigesimal" watch? https://en.wikipedia.org/wiki/Kaugel_language:)

Always fun to show people asking for the time... It is 9:41:33 a.m.