Common Watch Function
The simplest gauge to distinguish the water resistance of a watch is by its shape: generally, round watches have the best water resistance and oval watches follow while square or irregularly-shaped watches have poor water resistance because a rubber circle is the most closely bounded with a round watch. Secondly, materials also matter here. Copper, aluminium or gold-coated materials will deteriorate over the long term and hence water resistance will be affected. Thirdly, edges of the back cover and the crystal are the most vulnerable to water and therefore the watch design is an absolute determinant of water resistance. For instance, watches with a screw-in crown and back cover, a watch frame and a thick and robust profile normally have sound water resistance; ultrathin watches can't effectively keep off water due to limited spaces inside; the winding stem of multifunctional watches are easily defective in waterproof design.
