Cartier’s dive watch. 300 metres, in-house, on rubber.

Cartier launched the Calibre in 2010 as its first men’s sports watch with an in-house automatic, the 1904 MC, and the Diver of 2014 took the same case to the ISO 6425 dive standard: 300 metres, a unidirectional bezel, a screw-down crown and lume you can read in the dark, all at 11mm thick, which was thin for a certified diver. The oversized XII and the small seconds at six are the Calibre’s signature. Cartier has since discontinued the line, so pre-owned is where it lives.

On rubber it is the least expensive automatic Cartier on this page, and the only one you would swim in. Rebag notes light scratches on the crystal, which on a sapphire crystal usually means hairlines that catch the light; ask for a close-up. No box or papers; the reference is on the caseback and should read W7100056 if it is the steel version on rubber.

Rebag gives the size as 42mm, the thickness as 11mm, the band width as 24mm, the wrist size as 8.0 inches, steel for the case, rubber for the band, an automatic movement with date, diver bezel and screw-down crown, no accessories, and Very Good with light scratches on the crystal and minor wear. No reference is stated; W7100056, its calibre and 300 metres are Cartier’s figures for the catalogue match, marked confirm.

Rebag authenticates in-house and is not a Cartier authorised dealer, and Amazon adds its 30-day return window. Ask for the reference and the numbers on the caseback, close-up photographs of the wear, and when it was last serviced. Nothing here was measured on the watch.

This unit is sold by Rebag through Amazon Luxury Stores, authenticated by the seller with Amazon’s 30-day return window on top; it is one piece, and when it sells the listing goes away, so the second button opens the live search for Calibre de Cartier Divers.

Steel Cartiers have resold close to what pre-owned buyers paid, sometimes more, sometimes less; that is a pattern, not a promise, and nothing here is investment advice.