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Longines Caliber L888

Longines Caliber L888

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.

Video Instruction Manual:

Additional Resources:

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SVBeta
SVBeta
1 year 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
1 year 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.

Utopia39
Utopia39
1 year ago
Reply to  Luke Osborne

I’ve had a hydroconquest 43mm and the L888 movement is doing wonders. Buy with confidence

John Raba
John Raba
9 months ago
Reply to  Luke Osborne

I have the 39mm version with the black dial and black ceramic bezel. Built beautifully and like a tank. Over the last 2.5 weeks its daily rate has been consistent at 5 seconds fast per day. If there are any positional errors they cancel out. Mine has the L888.2 version of the modified 2892-A2. It also has what is essentially a free sprung balance wheel. There are two screws on the rib of the balance wheel that can be used to “adjust” its daily rate. Only a good watchmaker should attempt this lest he damage the balance wheel. I have… Read more »

Erlingni
Erlingni
1 year 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.

Ben
Ben
1 year ago

Why don’t Longines use transparent caseback as other do to show inside beauty?

Sahin
Sahin
5 months ago
Reply to  Ben

They do make watches with Open caseback

Eldar
Eldar
1 year ago

Got my 39mm blue HydroCon on bracelet yesterday, and it’s even more stunning in person than on pictures/videos. I was a bit worried about the blue tones, if they would be too prominent, but they look absolutely breathtaking. Regarding the closed caseback, I am perfectly fine with it and I agree with the decision to go this route in order to make the watch more affordable. Same goes for the bracelet, especially the clasp. Still need to size it but overall, quite impressive. The weight is perfect and the movement action on winding is very satisfying as well.

Tauras
Tauras
11 months ago

Just got my hydroconquest black dial with green ceramic bezel L3.781.4.05.6 it comes with silicone balance spring very nice watch

Salvo
Salvo
10 months ago

I’m trying to understand features of Omega 3330, which is based on L888.2, which is based on ETA A08.L01.
Any data on this last one ETA caliber?

John Raba
John Raba
9 months ago

I have the Longines Hydroconquest 39mm (L888.2) with a bracelet, black dial, ceramic brezel. I is tested to 1000 feet. I have been watching the timing for two weeks since I bought it new. It has run 5 seconds fast per day with no deviations. That is well within COSC even though the watch is not COSC certified. This movement has what is essentially a free sprung balance and a 72 hour power reserve. This is just a wonderful movement appropriately decorated.

MBendell
MBendell
8 months ago

I have owned the Hydroconquest 39mm Blue Ceramic bezel watch with L888.5 movement since Feb. 2022. From the day I purchased the watch, I never experienced the full reserve time as specified in the warranty (65 hours). Over time that reserve dwindled to about 24 hours. As a result, I contacted Longines and sent the watch in for warranty repair. They have acknowledged that the timepiece requires service: ” A partial service is required in order to adjust the timing of your watch.” They are estimating the repair will take approximately one month due to service volume. Personally, I love… Read more »

Joe Cool
Joe Cool
7 months ago
Reply to  MBendell

I’ve the same 39mm Blue Ceramic HydroConquest. In all other aspects, the watch is fantastic.

The one “downside” is the power reserve. I’m not able to determine what variant of the L888 movement it has without opening the case back.Full wind + wearing the watch for a few days yields 63 hours. Just winding the watch and left unworn yields 39 hours.

Considering getting it serviced…

Adam
Adam
5 months ago

My 41mm 2023 Conquest has the L888.5

Simon.Costin
Simon.Costin
4 months ago

I purchased a hydroconquest 41mm, 3 months on and its as it was the day i bought it i use it daily.
Its so accurate and marches along with ease and confidence. Amazing solid comfortable watch. Well worth the price tag. Have no doubts.

Aavie
Aavie
3 months ago

I thought the L888 was an in-house movement. Didn’t Longines used to make their own movements in-house?

Jimmy C
Jimmy C
2 months ago
Reply to  Aavie

They use ETA which have the same owners (Swatch Group) so technically they are still in house. I have a couple of Longines from the late 60s early 70s including a high beat (Ultra Chron) which were made by Longines themselves.

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