Tudor Caliber MT5261

Tudor Caliber MT5621

Tudor Caliber MT5261

Manufacturer Tudor
Caliber Number MT5261, MT-5261
In-House Yes
Measurements 33.8mm x 6.5mm
Vibrations Per Hour 28,800 bph (4 Hz)
Power Reserve 70 hours
Jewels 28
Hacking Yes
Functions Hours, minutes, seconds, date (3:00), power reserve indicator (9:00)
Country of Manufacture Switzerland
Known Models
Tudor North Flag

The Tudor MT5261 automatic caliber is an in-house Certified Chronometer (COSC) movement. It is equipped with a bidirectional rotor system and variable inertia balance, micro-adjustment by screw. This caliber also features a non-magnetic silicon balance spring – a first for Tudor (aka Rolex).

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Tom
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Tom

And this is after Rolex has been saying no silicone hairspirings and no see-through case backs for years! Liars!

King Henry VIII
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King Henry VIII

That may very well be true for Rolex as a brand, but this is a Tudor movement đŸ˜›

Nancy G.
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Nancy G.

Is it made by Rolex? I’m confused.

TheOneInYellow
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The Manufacture Calibre MT5621 is the very first in-house movement made by MontrĂ©s Tudor in their own facilities (with possible engineer help from MontrĂ©s Rolex). Introduced at Baselworld 2015, this news blew the watch industry journalist’s minds, because this was totally new, yet not unexpected. The North Flag also has many firsts for Tudor: – First use of ceramic in a ceramic/steel construction (ceramic ring is the bezel, topped with a stainless steel ring, and sits on a monocoque 316L stainless steel case). – First use of a sapphire display caseback – First use of a silicone hairspring in a… Read more »

Randy Axy
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Randy Axy

This makes it look like Tudor is Rolex’s experimental division. My last 2 watches have been Tudor, one being a North Flag watch with this exact movement. I don’ think I will ever buy another Rolex. The Tudors are way cooler for less than half the price.

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