Summer people tend to buy good watch waterproof functions.Those wear graceful and need not worry about disappointing in swimming, rain, and even when diving, people's mood be in this watch also sunny in summer.

1. Spiral waterproof watches. This watch case and the rear cover is engraved with thread, Depend on the role of thread to tightly screw the case and the rear cover.

watch glass is rolling in to use tools, the more closely. Crown and the back cover has a waterproof gasket (mostly made with butyl rubber cyanide). This waterproof watch outside with sunken mouth in rear cover ,some of the convex polygons, it must be with the appropriate tools to remove the back cover.

2. Withholding of waterproof watches.There are circle of high convex clasps inside cover, making the case and the rear cover can be close to withhold.

The same as spiral waterproof watches,Withholding of waterproof watch-glasses are rolling in to use tools and waterproof gasket.Watch the cover can pry with the knife ,with finger push or rolling mechanism to close the back cover.
Push .

3. Casing pressure waterproof watch.
It's case set in the bottom cover. The shape of the back cover is rather special : That is surrounded by a high wall and the movement mounted inside wall of the back cover.Watch glass and cover are tightly fastened after case firmly seting into,to play the role of sealing waterproofing function.

4.Rolex oyster watchesIn1927, Rolex find an excellent way of waterproof and dustproof-a double-locking crown that screwed down on the case creating an airtight seal. Because these oyster watches, Rolex has "the world's first watch brand" awards