Longines Caliber L888 Watch Movement

Brand	Longines
Caliber Number	L888
In-House?	No
Base Caliber	ETA A31.L11
Movement Type	Automatic
COSC?	No (Some variations are, see below)
Lignes	11 1/2”’
Diameter	25.6mm
Height	3.85mm
Jewels	21
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
Hand-Windable?	Yes
Hand-Count	3
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.