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French 
Omega Speedmaster Date original watch movement calibre 1152 – 25 Jewels from 1995.
Between the 861/1861 and the newer ETA/Dubois-Depraz movements, Omega used the 7750 Valjoux for a while. This is the one of the most popular chronograph movement the Swiss watch industry has on offer, with a unidirectional winder and a click spring construction, and you can find it in many other Swiss watches.
The key distinguishing features of the 7750 family are as follows:
Subdials at 6:00, 9:00, and 12:00 for hours, running seconds, and 30 minute chronograph counter, respectively
Conventional integrated center-mounted automatic winding in one direction
Cam-controlled chronograph functions
Simple three-plate brass base:
– Calendar plate with modular components
– Main plate with off-center center wheel, hacking lever, and simple bent-spring ratchet
– Top plate with additional winding bridge
Etachron regulator and balance spring stud
The Omega calibre 1152 automatic movement is based on the automatic chronograph 7750 Valjoux and it has a lever escapement, 25 jewels, mono-metallic balance, 28,800 BPH, Incabloc shock absorber.
The movement has overlapping circular patterns “œil-de-perdrix” finishing, the oscillating weight is decorated with “Cotes de Geneve” stripes and is engraved Ω | OMEGA | 1152. The movement is marked 25 JEWELS | TWENTY-FIVE | SWISS, Ω | 1152.
The layout is the standard 7750 Valjoux layout with small seconds at 9:00, chronograph seconds by central watch hand, 30 minutes at 12:00 and 12 hours at 6:00. The date opening is at 3:00, with black numbers on a white disc. This is an original date-only watch movement by fabrication, not a day/date.
The movement works well and is keeping a pretty accurate time. As for any other vintage or unused movement, a basic revision is recommended.
The article is sold as is – any other parts that are not visible in the photos or mentioned in the description, are considered as not included with this article.
