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Longines Caliber L844.4

Longines Caliber L844.4

Caliber NumberL844.4
Base Caliber
ETA A31.411 (A31411)
Movement TypeAutomatic, self-winding mechanical
Power Reserve~72 hours
Lift Angle51 degrees (unconfirmed!)
Beat Rate/Frequency
25,200 vph, 3.5Hz
Balance Spring
Monocrystalline silicon
Shock SystemNivashock
RotorBall bearing system
Rotor Winding DirectionBi-directional
Manual Winding Direction
FeaturesCentral hours; central minutes; central sweeping seconds; central GMT hand; date at 6:00
Hacking Seconds?
Country of ManufactureSwitzerland, Swiss made
Known ModelsLongines Spirit Zulu Time 39 (Refs: L3.802.4.53.2, L3.802.4.53.6, L3.802.4.63.2, L3.802.4.63.6, L3.802.4.93.2, L3.802.4.93.6), Longines Spirit Zulu Time 42 (Refs: L3.812.4.53.2, L3.812.4.53.6, L3.812.4.63.2, L3.812.4.63.6, L3.812.4.93.2, L3.812.4.93.6), Longines Master Collection GMT  (Add your watch in the comments below…)

The Longines caliber L844.4 is 4-hand automatic GMT watch movement based on the ETA caliber A31.411. It is a Swiss made with 21 jewels, produced by ETA (Swatch Group).

GMT Complication:

Watches with the L844.4 are considered to be “true” GMT or “traveler’s” GMT thanks to its independently adjustable 12 hour hand – allowing for quick adjustment of time zones while maintaining your home time with the GMT hand.

ETA for Longines:

You may see some of the watch blogs and reviewers taut this movement as an ETA based movement “made exclusively” for Longines. That may be true (for now), but keep in mind that it’s just a fancy marketing way of dealing with the fact that ETA and Longines are both part of the Swatch Group conglomerate of watch companies, and the movements made by the ETA division are technically not “in-house”. For some unsuspecting enthusiasts, marketing jargon such as “exclusive” might have a similar effect as “in-house”. It’s not good or bad one way or the other, but it’s interesting to see the way brands handle marketing, and even more so the way some blogs handle the way they present a brand’s product to the market.

Caliber number location:

The L844.4 has the Longines caliber designation on the rotor and the ETA base movement engraving under the balance wheel. This movement is also marked with “V8” which you can learn more about here.

Longines Calibre L844.4 VS L844.5:

There is a similar caliber L844.5 that was announced in August 2023 as part of the new Longines Hydroconquest GMT models.

Both calibers have 21 jewels, GMT complication with independent hour hand setting, beat rate of 25,200bph, 72 hours of runtime and the silicon hairspring.

The main difference between the two movements seems to be that the L844.5 is not a chronometer spec movement certified by COSC. If there is anything else that was missed here, please add it to the comments below…

Video Instruction Manual:

Additional Resources:

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7 months ago

The only difference between the Zulu Time release and the Hydroconquest GMT release was that Longines state 600Gauss magnetic resistance for the Hydroconquest but not for the earlier Zulu Time release. So I wonder if there is more to it than just the COSC certification and they have a few more non-magnetic parts that some articles mention without being too specific.

7 months ago
Reply to  BB025

I believe the magnetic resistance on the Zulu Time models is from an iron cage, not any changes to the movement’s components. I’m sure they added the iron cage to keep it within COSC specs.

1 month ago
Reply to  Tim

Hi, do you have some information or link that Zulu time has an iron cage, I have not seen this being specified anywhere? Thank you!

6 months ago

No quick date setting function could be quite annoying. (i.e. having to rotate the local hour hand through 24 hours, multiple times, just to set the date correctly)..

5 months ago
Reply to  Chris

To be clear, this is how all flyer GMTs work, like Rolex, Grand Seiko, Omega. You can also move the date backwards to find the correct date.

5 months ago

Is it free-sprung?

1 month ago
Reply to  calibercorner

Hi, I checked few images and from my understanding it is a free sprung – it is regulated with screws on the balance wheel. It doesn’t have a bridge holding the balance wheel though. Is my understanding wrong of what a free sprung wheel means?

4 months ago

Parlando direttamente con Longines, ho avuto conferma che il calibro L844.4 ha una riserva di carica di 64 ore e non di 72 ore. A detta loro, il sito verrà aggiornato riportando le corrette specifiche tecniche.

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