Steel case, 43 mm diameter Anti-reflective sapphire crystal and back White Dial Automatic movement, Grande Lune module, 50-hour power reserve, Swiss made Functions: hours, minutes, seconds, calendar at 6 o'clock, moon phases at 6 o'clock, day and month at 12 o'clock Hermetic up to 3 bar. In any case, it is not recommended that you wear your Hermès watch with a leather strap if it is going to come into contact with water. Abyss blue matte alligator strap, single loop, long size, steel folding buckle * The leather used for the straps, as a natural material, varies from one model to another. In particular, alligator skins (scale size), calfskin (natural grain) and their respective colors.