Most cases fall into the category of round, with a circular chassis holding the dial and movement. This design is the most efficient for analogue dial watches.
Typically tricky to manufacture, square-cased watches offer a unique, sporty style. TAG Heuer’s Monaco is a fine example of a square-cased watch.
A tonneau case is an elegant, multi-plane design used in dress watches to curve them discreetly to the wrist. The complex shape makes them exclusive.
A design defined by the transition from pocket to wristwatches, when wire lugs were soldered to cushion-like cases so they could be worn on the wrist.