Celebrating a high-frequency pioneer in underwater timekeeping

Inspired by the original Longines Ultra-Chron Diver of 1968, this next-generation Ultra-Chron and its new state-of-the-art high-frequency calibre represent the first reinterpretation of what sets Longines apart – its status as a pioneer in the world of sports timing.

Designed for lovers of vintage dive watches and high technology aficionados, this Ultra-Chron is powered by the new Longines L836 calibre, which is a high-frequency (5Hz) mechanical self-winding movement with silicon balance spring. Characterized by its ultra-smooth sweep seconds hand, high-frequency watches are prized by collectors for their accuracy, so in keeping with those traditions, Longines ensures that each Ultra-Chron watch meets the strict chronometric precision criteria established under ISO 3159 (-4/ 6s day) in order to be called Chronometer, before taking the traditional COSC testing one step further by then casing the watch and subjecting it to a series of additional tests designed to simulate daily wear, over the course of 15 days.

The watch will be delivered in a special presentation box containing an additional black NATO strap crafted from recycled material.

Specifications

Case

• Shape: Round
• Material: Stainless steel
• Glass: Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on the underside
• Case Back: Screw-down case back
• Dimension: Ø 43.00 mm
• Lug Distance: 22 mm
• Thickness: 13.6 mm
• Water Resistance: Water-resistant to 30 bar
• Case Specificities: Uni-directional rotating bezel, screw-in crown, engraved screwdown caseback

Dial and Hands

• Dial Colour: Matte black
• Hour Markers: Applied wedge-shaped indexes
• Hands: Silvered polished hands
• Specificities: Swiss Super-LumiNova®
  

Movement

• 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

Strap

• Material: Seven-link "beads-of-rice" style stainless steel bracelet. Includes additional NATO style pass-through strap with strap-changing tool