The smooth, seven-sided crown screws down, contributing to the 300-meter water-resistance rating. Add the crown guard, and the diameter is just over 45 mm. At 43.8 mm, the bezel is larger than the case, making it easier to grip. The case is officially listed at 42 mm in diameter. The oversize crown guard teams up with the bezel to make the watch wear larger than its specs indicate. When a strap is fitted, the screws play only an ornamental role. The screws at the end of each lug help secure the bracelet. This gives the watch a finished look, and it creates the impression that the strap is attached with curved spring bars, which it is not. The lugs are steeply curved and, combined with the rubber strap, make the Calibre Diver very comfortable to wear. On our test watch, this angled lip covers the gap between the strap and the case. Between the lugs, the top of the case band angles out to meet the bracelet’s end pieces. A polished bevel along the outer edges of the lugs catches the light. All its surfaces wear a fine brushed finish. At 111 grams, it’s also light, but as we’ll see, it’s no lightweight. When designing the watch, Cartier prioritized a svelte profile.

At 10.92 mm thick in our calipers (and 11 mm officially), the Calibre Diver is slim. Aesthetically, the case is clearly a member of the Calibre de Cartier family. The Cartier Calibre Diver The Cartier Calibre de Cartier Diver’s Lookĭive watches are defined by their cases, so that’s where we will begin.

Cartier calibre watches