This watch applies total perspective design. The large 42mm round case is constructed of alloy plating material, inside which skeleton full-automatic mechancal device can make you see all the movement of the gear system in every second. The strengten crystal glass is shiny, clear and wear-resisting. The highly sealed screw-in crown can be opened only by professional tools, which make the watch highly waterproof. The genuine leather strap, matching with the proper design for our wrist curve, make it very comfortable for us to wear the watch! The watch is not only a watch but also a piece of mechanical art on the wrist!