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Certina caliber 25-66M

Certina Caliber 25-66M

Certina caliber 25-66M

Brand Certina
Caliber Number 25-66M
Movement Type Manual wind, mechanical
Diameter 11.5”’ (25.6mm)
Thickness 3.85mm
Jewels 17
Lift Angle 50 degrees
Power Reserve 42 hours
Vibrations Per Hour 19,800 bph
Balance Staff U2822
Hairspring Flat
Hands 1.50 / 0.90 / 0.18
Anti-Shock Incabloc
Features Hours, minutes, sweeping seconds
Country of Manufacture Switzerland
Production Years 1970s
Known Models Certina Club 2000

The Certina caliber 25-66M was in production between 1975-1977. This movement was produced in Solothurn, Switzerland.

The movement pictured above was found in a vintage Certina Club 2000 watch.


All the Certina in-house movements that I’ve encountered are great performers and you can accurately regulate them with the micro-regulator.

There is also a similar Certina caliber 25-66 which is almost identical to the caliber listed here with the exception of the balance wheel having 2 spokes (instead of 3 spokes on the 25-66M variant). You may also see a caliber 25-661 which adds a calendar complication.

Certina was founded in 1888 in Grenchen, a municipality of Solothurn, Switzerland. The company is now part of the Swatch Group conglomerate and watches are still being made under the Certina name. Find examples of modern Certina watches here.

Please share your experiences and thoughts about the caliber 25-66M in the comments section below…

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Service: Certina Club 2000 With 25-66M Movement - WahaWatches

[…] the 25-66M movement in this Certina wasn’t […]