Certina DS-2 watches

The Certina DS-2 is a sports line in the Swiss brand's DS family. It revives the DS-2 of 1968, which, in Certina's words, set new benchmarks for resistance. DS stands for Double Security, the construction Hans and Edwin Kurth introduced at Certina in 1959: the movement sits suspended inside a reinforced case to protect it from shocks and water. The modern DS-2 line dates from 2013.

The DS-2 Quartz is a 40 mm watch about 9.3 mm thick under sapphire, on a bracelet or a strap. Most are steel; the C024.410.44.081.20 puts the grey-dial watch in titanium. The DS-2 Green, Red and Yellow (C0244101605102, C0244101605103, C0244101105101) keep the 40 mm case and carry the colour in their name, over a black dial on the Red and Yellow.

The chronographs move up to 41 mm and add a tachymeter bezel. The DS-2 Chronograph comes in steel with a grey or black dial and in two-tone versions, at about 12.95 mm thick. The slimmer Chrono 1/100 Sec PreciDrive references, at 12.45 mm, are named for timing to a hundredth of a second, and their names also give the colour treatment: Inverted Panda (C0244471105100), Green, Yellow and a Leather version on a strap. The Chronograph Flyback (C024.618.11.051.01 on a bracelet, C024.618.16.051.00 on a strap) moves up again to 43 mm, still with the tachymeter scale, and a steel and rose-gold PVD flyback on a strap (C024.618.26.031.00) sits alongside them.