Longines Caliber L633
Longines Caliber L633

Longines Caliber L633.5

Brand Longines
Caliber Number L633.5
In-House?
No
Base Caliber
ETA 2824-2
Movement Type Automatic, self-winding mechanical
Lignes 11.5”’
Diameter
25.6mm
Height
4.6mm
Jewel Count
25
Beat Rate
28,800 vph, 4Hz
Lift Angle
50 degrees
Power Reserve
38 hours
Rotor Style
Ball-bearing
Rotor Winding Direction
Bi-directional
Hand-Windable?
Yes
Anti-Shock Device
Incabloc
Hand Count 3
Functions Central hours; central minutes; central sweeping seconds; date at 3:00
Hacking Seconds?
Yes
Quickset Date?
Yes
Country of Manufacture Switzerland, Swiss made
Known Models
Longines Conquest Automatic, Longines Conquest Heritage, Longines Hydroconquest Automatic, (Add your watch to the comments below…)

The Longines caliber 633.5 is Swiss made lever style automatic watch movement with 25 jewels and a frequency of 4 Hz (28,800 bph).

It not an ETA clone, because it literally is an ETA. The L633.5 is essentially an ETA calibre 2824-2 with a Longines branded rotor. It is said to be an Elabore grade.

Longines L633.5 VS L633.1 / L633.2:

There is a vintage cal. L633.1 which is based on the ETA 2836. Differences between the 633.1 and 633.2 are that the L633.1 has 25 jewels and the L633.2 has 17 jewels.

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