Ultra‑chron 43.00mm

The Ultra Most Accurate Watch

Inspired by the original Longines Ultra-Chron Diver of 1968, the new model and its new high-frequency calibre represent the first reinterpretation of what sets Longines apart – its status as a pioneer in the world of sports timing. It will appeal to both vintage watch aficionados and lovers of high technology. The accuracy of the Longines Ultra-Chron is confirmed by its certification as an “ultra chronometer” by TIMELAB, an independent testing laboratory in Geneva. This designation goes beyond the usual “chronometer” certification.

Case
Shape	Round
Glass	Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides
Case Back	Screw-down case back
Dimension	Ø 43.00 mm
Lug distance	22 mm
Thickness	13.60 mm
Water Resistance	Water-resistant to 30 bar
Case Specificities	Screw-in crown, Unidirectional rotating bezel
Weight	108.1 g
Dial and Hands
Dial colour	Black
Hour markers	Applied indexes
Hands	Silvered polished hands
Specificities	Swiss Super-LumiNova®
Movement and Functions
Movement Type	Automatic
Caliber	L836
Movement Description	Self winding mechanical movement beating at 36'000 vibrations per hour, with a monocrystalline silicon balance-spring power reserve of approximately 52 hours
Functions	Hours, minutes, seconds
Longines exclusive calibre	Yes
Strap
Top	Young cow leather
Underside	Calf leather
Colour	Brown
Buckle	With buckle
General
Magnetic resistant	Yes