Get ready for picnics, back garden parties, date evenings and everything in betweenGarden accessoriesPicnicware 100M Water resistant: By using a h2o resistance of around 100M you can easily tackle most scenarios in everyday life, such as washing palms, rain, swimming(please tighten the crown when heading into the water). On the https://www.watchesworld.com/a-history-of-watch-reference-numbers/