Certina DS Action Diver 40.5mm Titanium

The DS Action Diver 40.5 fills the gap Certina left between its 38 mm and 43 mm divers, and Fratello's reviewer, who had been asking for exactly that size for years, predicted it would become the best seller in the range. At 40.5 mm across and 48 mm lug to lug it has the footprint of a Submariner, with 300 m of water resistance, a domed sapphire crystal, a screw-down crown and a ceramic bezel. The titanium version has a dark blue dial and a matching titanium bracelet, and weighs 124 g. It is 14.1 mm thick, which is where it gives something away to the watches it is compared with. Inside is the Powermatic 80, Swatch Group's automatic with 80 hours of reserve, enough to leave it off over a long weekend. Certina lists it at CHF 895.

Written 28 September 2026 from Certina's product page and Fratello's hands-on.