Tudor in-House Caliber MT5652 Complete Guide

Tudor MT5652 caliber

Tudor in-house Caliber MT5652 Specifications

In the work towards establishing itself as a major player in the luxury watch industry, and to differentiate itself from its bigger brother Rolex, Tudor has, since 2015 released a number of in-house calibers.

The first in-house caliber was launched in 2015, and it’s safe to say that the brand has only increased in popularity in recent years. Building and developing in-house movements is considered an important effort for any watch company that is serious about its craft.

Developing in-house movements takes time and effort, and demands lots of resources. But at the same time, it gives the watches a greater value proposition to your customers as it makes the brand go from a watch assembler to a watch manufacturer. It goes to show that the brand goes above and beyond to invest resources into the watch industry, and developing into its own craft. It also gives the brand greater control and more independence. Making your own in-house movement as a manufacturer means going from a watch assembler to a watch manufacturer.

Tudor MT5652 caliber

In this article, we are going to go into detail about the Tudor in-house caliber MT5652.

Tudor in-house caliber MT5652

The Tudor Caliber MT5652 was presented at Baselworld 2018 when the Tudor Heritage Black Bay GMT 79830RB was released. The movement is used in this watch, making it the first in-house GMT caliber from Tudor.

It is an automatic and analog caliber beating at 28800 BPH (4hz) and has a power reserve of 70 hours. It uses 26 jewels. The functions include hours, minutes, seconds, additional GMT 24 hour hand (adjustable), and a date function. The MT5652 is a certified chronometer, which has passed the stringent tests of accuracy and reliability of COSC.


The Tudor Caliber MT5652 is 31.80 mm/7.52 mm in size. The ”MT” at the beginning of the reference number means ”Manufacture Tudor” and tells us that this is an in-house caliber manufactured by Tudor. The movement is equipped with a traversing balance bridge, free-sprung balance wheel, and silicon hairspring.

Tudor MT5652

  • Brand: Tudor.
  • Description: Self-winding movement, bi-directional winding, COSC certified chronometer.
  • Functions: Central seconds, instantaneous date wheel with quickset function, GMT hand, bi-directional winding rotor, hacking seconds, variable-inertia balance with micro-adjustment, silicon balance spring.
  • Data: Diameter 31.8 mm, 7.52 mm in thickness.
  • Jewels: 26
  • Frequency: 28,800 A/h
  • Power reserve:  70 hours
  • Released: 2018

Tudor Caliber MT5652 watches

The Tudor Caliber MT5652 is used in the Tudor Black Bay GMT reference 79830RB as well as the Black Bay Pro reference 79470 and the Tudor GMT in gold and steel, reference 79832MN.

Tudor mt5652 accuracy

The caliber MT5652 is a COSC certified movement which means that the least accepted accuracy is -4 to +6 seconds deviation per day

Images from Tudor.

2 thoughts on “Tudor in-House Caliber MT5652 Complete Guide

  1. The problem here is that even the best watchmakers in the US are unable to secure the Microstella Balancing Wrench / Regulating Tool for Tudor’s Caliber MT5652.

    My watchmaker theorized that Tudor wants to require all owners of their calibers to be forced to only work with Tudor on servicing issues. Unlike with Rolex which most watchmakers have the Microstella Balancing Wrench / Regulating Tool for adjustments and thus in a couple or few visits you can get your Rolex to within a <+1 accuracy, at least my watchmaker always has with my watches I wear 24/7.

    Where can my professional watchmaker source the Microstella Balancing Wrench / Regulating Tool for the Caliber MT5652?

    1. Hi,
      Thanks for sharing. Yes, that is certainly a logical and perfectly reasonable theory.
      I would say that the best shot would be to find a third-party tool on places like Aliexpress or Alibaba. Finding an original one would likely be extremely difficult as Tudor does not sell tools to non-authorized retailers.

      Kind regards,
      Millenary Watches

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