Quality Swiss Automatic movement; Functions without a battery; Powers automatically with the movement of your armFunctions without a battery; watch powered automatically with the movement of your armDomed, anti-reflective scratch-resistant sapphire crystalStainless-steel case; White dial; Day-date-month functions; Chronograph functions; Tachymeter functionWater-resistant to 330 feet (100 M)

Omega 1861 Caliber Swiss mechanical-hand-wind chronograph used on the Moon; 48-Hour Power ReserveFunctions without a battery; must hand wind crown to power watchHesalite crystal; Luminescent hands and hour markersStainless-steel case; Black dial; Chronograph functions; Tachymeter functionWater-resistant to 50 M (167 feet)

Quality Swiss Automatic movement; Functions without a battery; Powers automatically with the movement of your armDomed, scratch-resistant sapphire crystal with anti-reflective treatment insideCase diameter : 35.3 mm18kt. Yellow gold - stainless-steel case; Silver-white dial; Date functionWater-resistant to 50 M (167 feet)

Automatic movementScratch resistant sapphire crystalCase diameter : 42.3 mmMetal caseWater-resistant to 984 feet (300 M)