This Cartier Rotunda watch has an 18kt gold case material with a case thickness of 4.72mm and a case diamter of 26.2mm. It has a silver guilloche dial color. It has a fixed bezel. It has a mechanical movement which will never require a battery because it is manually wound. The clasp is a fold-under deployment clasp which is connected to a nice black alligator strap. It can resist water down to 100 feet deep, which is quite nice for a non-diver watch. It has a scratch resistant sapphire crystal to keep the watch looking good. 18kt Rose Gold Octagonal Crown which is embedded with a sapphire. The buckle on this watch is also 18kt gold. In the day the watch displays a sun and in the night it displays a moon, this is quite awesome if you ask us.