Longines Ultra-Chron Classic 37mm Black Leather Strap Watch

Inspired by the pioneering 1968 Ultra‑Chron Diver, the new Longines Ultra‑Chron combines heritage design with cutting-edge watchmaking. Its 37mm stainless steel case houses a sunray silver dial with applied indexes and polished silvered hands, echoing the aesthetic codes of the original professional diving model. Powered by the chronometer-certified Longines calibre L836, this high-beat automatic movement operates at 36,000 vibrations per hour and features a silicon balance-spring, magnetic resistance, and a 52-hour power reserve. Functions include hours, minutes, seconds, and date. Finished with a black alligator strap and scratch-resistant sapphire crystal with anti-reflective coating, the watch measures 37mm in diameter, 10.95mm thick, and has a 44.6mm lug-to-lug distance. Water-resistant to 5 bar, the Longines Ultra‑Chron combines precision, durability, and timeless style.