Ref. L2.537.4.72.2
The Longines Ultra-Chron Classic, reference L2.537.4.72.2, is chronometer-certified and has a 37 mm steel case. Applied indexes and polished silvered hands appear on the sunray silver dial. The case measures 10.95 mm thick and 44.6 mm lug-to-lug, with water resistance rated to 50 metres. Self-winding calibre L836.6 provides up to 52 hours of power reserve and beats at 36,000 vibrations per hour. A scratch-resistant sapphire crystal has several layers of anti-reflective coating on both sides. A black alligator leather strap with a calf leather underside fastens with a pin buckle. The dial displays the date and central seconds.
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TECHNICAL SPECIFICATIONS
GENERAL
Gender
Unisex
CASE
Diameter
37mm
Thickness
10.95mm
Lug to Lug
44.6mm
Lug Width
19mm
Case Material
Steel
Water Resistance
50m
Crystal
Sapphire Crystal
MOVEMENT
Movement Type
Automatic
Caliber
L836.6
Power Reserve
52h
Frequency
36,000 vph (5 Hz)
DIAL
Dial Color
Silver
Numerals
Lines
BRACELET/STRAP
Bracelet/Strap
Alligator Skin
Clasp Type
Buckle
FEATURES & COMPLICATIONS
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FOR WATCH DEALERS
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