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Tudor MT5621

Tudor MT5621 (click to enlarge!)
Tudor MT5621
© Tudor

Cal. MT5621 is the first in-house movement from Tudor, introduced in 2015.


Tudor traditionally used movements from major manufacturers, chiefly ETA in modern times, as a differentiator from parent company Rolex. Beginning in 2015, the company began producing a line of “Manufacture Tudor” movements for certain models. These are based on Rolex technology, and include that company's silicon hairspring technology, full balance bridge and free-sprung Microstella balance wheel.

Cal. MT5621 was the first Manufacture Tudor movement and features a power reserve indicator at 9 00. Most other features are more common, including central seconds, and a conventional date wheel. The specs of Cal. MT5621 are identical to the smaller Rolex 3255 in the Rolex Day-Date 40 introduced at Baselworld in 2015. Cal MT5621 is finished in a simple “industrial” motif rather than with elaborate anglage or finishing.

This movement features modern technology, including bi-directional winding, hacking seconds, instantaneous date change with crown-based quickset, and a variable-inertia balance with micro-adjustment by screw and silicon balance spring.


Cal. MT5621 was used in the following models





  • D 33.8 mm, H 6.5 mm
  • 28 jewels
  • 28,800 A/h
  • Power reserve 70 hours

Production period:

tudor_mt5621.txt · Last modified: 02.12.2022 20:38 by

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