CO-1 Chronograph Automatic

The CO-1 Chronograph Automatic, reference 01128-37GNNOCA-GNO, is a diver's chronograph from Edox's CO-1 collection, 45 mm across and 16 mm thick in stainless steel with grey PVD, water resistant to 500 metres. It has a grey dial and comes on a rubber strap. Inside is an automatic movement Edox calls the Caliber 011, naming the Sellita SW 500 alongside it. The helium valve matters to saturation divers: helium that seeps into the case during long stays at depth can escape through it on the way up, instead of pushing the crystal out. The chronograph is a stopwatch built into the movement: the pushers start, stop and reset it, and the subdials count the elapsed minutes and hours. Edox gives its weight as 160 g.