Meanwhile, there’s some evidence that Global distributors hated the inconsistent and infrequently illogical numbering devices in their Swiss overlords. 100M Water-proof: Which has a drinking water resistance of as much as 100M you can easily tackle most conditions in everyday life, for example washing arms, rain, swimming(please tighten the crown https://www.watchesworld.com/a-history-of-watch-reference-numbers/