Montblanc Caliber 4810 502

Montblanc Caliber 4810-502

Montblanc Caliber 4810 502

Manufacturer Montblanc
Caliber Number 4810 503
Base Caliber
ETA / Valjoux 7753
Movement Type Automatic
Jewels 27
Power Reserve 48 hours
Diameter 13 1/4”’ (30.00mm)
Height 7.9mm
Vibrations Per Hour 28,800
Lift Angle 49 degrees
Shock System Incabloc
Regulator Etachron
Rotor System Ball bearing
Winding Direction Uni-directional > clockwise
Hacking? Yes
Hand-Windable? Yes
Features Hours, minutes, small seconds, central chronograph seconds, date, 30 minute counter, 12 hour counter
Country of Manufacture Switzerland
Known Models Montblanc Timewalker XL Chronograph

The Montblanc caliber 4810-503 is based on the ETA/Valjoux caliber 7753. This caliber number was recently updated to MB 25.02.

Not a 7750

You may see many bloggers or watch sellers incorrectly listing the base as an ETA 7750. The difference, which makes for the signature styling of the Montblanc Timewalker featuring this movement, is the placement of the subdials. The 7753 has the subdials at 3, 6, and 9. Another differentiator is that there is date pusher on the side of the case at 10:00. This is why the Montblanc Timewalker includes a special pusher tool. If the movement were based on a 7750, it would be possible to set the date via the crown.

Montblanc 4810 503 vs ETA 7753

Montblanc made a few changes to their caliber 4810 503 compared to the standard ETA 7753. In most timepieces with the 7753 you will find the date at 6:00, however, Montblanc fit the date between 4:00 and 5:00.

More Info:

  • Official ETA caliber 7753 tech sheet here
  • Official user guide pdf here

Watches with this movement:

Please share your experiences and thoughts about the Montblanc 4810 503 in the comments below…