The Longines Heritage Military COSD (Ref. L2.832.4.53.0/5) is a modern reissue of a 1940s timepiece designed for the British Combined Operations Command. It features a 40mm stainless steel case with a distinctive matte black dial and a broad arrow symbol, historically used to indicate British government property.
Movement: Longines Caliber L619.2 (Automatic), which is based on the ETA 2892-A2. It operates at 28,800 vph and offers a 42-hour power reserve.
Case Dimensions: 40mm diameter and approximately 10mm thick. The lug-to-lug distance is quite long at 52.1mm, though the lugs curve downward to aid fit.
Dial Features: Matte black finish with Arabic numerals, a red 24-hour inner scale, and a date window at the 3 o'clock position. Hands and hour markers are coated in Super-LumiNova for low-light visibility.
Crystal: Scratch-resistant sapphire crystal with several layers of anti-reflective coating on the underside.
Water Resistance: Rated at 3 bar (30 meters), making it resistant to light splashes and rain but not suitable for swimming.
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