Cc Bg 1920 1280
Longines Caliber L888

Longines Caliber L888

Brand Longines
Caliber Number L888
Base Caliber
ETA A31.L11
Movement Type Automatic
No (Some variations are, see below)
Lignes 11 1/2”’
Height 3.85mm
Power Reserve ~72 hours
Lift Angle 51 degrees (unconfirmed!)
Vibrations Per Hour 25,200, 3.5Hz
Shock System Nivashock
Rotor Ball bearing system
Winding Direction Bi-directional
Hacking? Yes
Features Central hours; central minutes; central sweeping seconds; date at 3:00 (no date also available, see below)
Country of Manufacture Switzerland, Swiss made
Known Models Longines Legend Diver (L3.774.4.50.6, L3.774.4.50.0)  (Add your watch in the comments below…)

The Longines caliber L888 is 3-hand automatic watch movement based on the ETA caliber A31.L11. It is a Swiss made with 21 jewels, produced by ETA (Swatch Group).

Longines L888 Variations:

There are other versions of the calibre L888 listed below.

  • L888 – Not COSC
  • L888 ND (No Date) – Not COSC
  • L888.2 –
  • L888.3 –
  • L888.4 – Silicon balance spring, COSC
  • L888.4 ND – Silicon balance spring; COSC
  • L888.5 – Silicon balance spring; not COSC

Editor’s note: Longines does not make it easy. Researching the differences between the various L888 calibers is its own kind of hell. There is minimal consistency. For example, on the black ceramic Hydroconquest (L3.784.4.56.9) press-release, Swatch Group makes a brief mention of the caliber L888.3 inside. Then, on the official product page, it is simply referenced as L888. Will update these pages with more info later.

Video Instruction Manual:

Additional Resources:

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2 months ago

So far just picked up the Hydro Con. 39mm Cermaic with silicon spring and the watch works like a tank. Nov. 2022 no issue or regrets. Best value out there for size, Power Reserve, 5-year warranty, and overall feel, ordered with the Rubber strap for winter use and have a Horus for summer (thinner and more breathable).

Luke Osborne
Luke Osborne
5 days ago
Reply to  SVBeta

March 2023 now, how’s the Hydroconquest holding up? I’m looking to pick up a 39mm model myself here this Summer.

26 days ago

My black ceramic Hydroconquest (L3.784.4.56.9) bought from AD november 2022 has a l888.5 movement inside. Only way to confirm this was to open the caseback, and read on the rotor.

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