In 2015, TUDOR announced its first Manufacture Calibre in its history, certified by the Swiss Official Chronometer Testing Institute (COSC). This high-performance calibre of excellent precision and proven robustness offers a 70-hour power reserve, meaning that its wearer can, for example, take off the watch on Friday evening and put it on again on Monday morning without having to wind it. It reaches a frequency of 28,800 beat/hour or 4Hz.
This is a variant of the TUDOR Manufacture Calibre developed specifically to equip the Black Bay Bronze model. Slightly larger in diameter and displaying hours, minutes and seconds functions, it bears the reference MT5601, in which “MT” stands for “Manufacture TUDOR”.
In addition to the hour, minute and central second functions, the calibre TUDOR MT5612 that powers the Pelagos provides an instant date display visible through an aperture positioned at 3 o’clock.
The calibre TUDOR MT5621 that powers the North Flag, apart from hour, minute and central second functions, provides an instant date display visible through an aperture positioned at 3 o’clock and a power reserve indicator in the form of a disc at 9 o’clock.