Our most nostalgic types are boldly reimagined with modern-day things and acquainted nods to our history of firsts. 100M Watertight: With a h2o resistance of around 100M you can certainly cope with most situations in everyday life, which include washing fingers, rain, swimming(you should tighten the crown when likely to https://www.watchesworld.com/a-history-of-watch-reference-numbers/