The watch must be cased in Switzerland and pass its final inspection in that country. A rectangular watch designed by Louis Cartier. The bars along the sides of the watch were inspired by the tracks of tanks used in World War 1. A metal that is used for some watch cases and bracelets. Titanium is much stronger and lighter than stainless steel.
Titanium is also hypo-allergenic.
A watch shaped like a barrel, with two convex sides. A device, invented by Breguet in 1801, in which the escapement is mounted in a small revolving cage as a means of overcoming the effects of gravity on the precision on a mechanical timepiece. It is designed to prevent a diver who has unwittingly knocked the bezel off its original position from overestimating his remaining air supply. Because the bezel moves in only one direction, the diver can err only on the side of safety when timing his dive. Many divers' watches are ratcheted, so that they lock into place for greater safety.