Current Production
Ultra-Chron Classic 40 mm
LONGINES L2.937.4.72.2
MSRP
$3,900 USD
Verified Aug 18, 2026
Case diameter40 mm
Case size40 mm
Lug-to-lug47.2 mm
Thickness10.95 mm
Lug width21 mm
Case materialStainless steel
CrystalScratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides
Water resistance50 m
MovementAutomatic
CalibreL836.6
Power reserve52 hours
DialSunray silver
Bracelet or strapAlligator strap, Black
Specifications as published by Longines →
Last verified Aug 18, 2026