Brand: Longines / Model: Master Collection / Reference number: L2.859.4.51.6 / Movement: Automatic / Case material: Steel / Bracelet material: Steel / Year of production: Unknown / Condition: Perfect / Gender: Men's watch / Movement: Automatic / Movement/Caliber: L688 / Power reserve: 54 h / Case material: Steel / Case diameter: 44 mm / Water resistance: 3 ATM / Bezel material: Steel / Crystal: Sapphire crystal / Dial: Black / Dial numerals: Roman numerals / Bracelet material: Steel / Bracelet color: Silver / Clasp: Fold clasp / Clasp material: Steel / Clasp material: Chronograph, Date / Clasp material: Display back, Small seconds