In addition to lines' standard ceramic insert, unidirectional rotating bezel and sapphire 43mm case, this exclusive model is made entirely of scratch-resistant black ceramic. They even imprinted "ZrO2" on the dial lest you forget its chemical composition.
A self-winding movement developed exclusively for the Swiss watchmaker powers the calendar and three hands, which are coated in white Super LumiNova to contrast against abundance of black.
Following suit with its name, the diving watch has a resistance of up to 300 meters and a 64-hour power reserve. A matching rubber strap with a double-security folding clasp ensures it won't be lost on a deep-sea excursion.
Longines' black ceramic HydroConquest goes on sale for about $3,530 this summer.