Tudor-manufactured movements
Some movements used in Tudor classic watches are manufactured by the Swiss companies ETA, Sellita or Valjoux, but in 2015, Tudor launched its first in-house movement for its Pelagos and North Flag watches. In 2017, Tudor entered into a cooperative agreement with Breitling, providing the MT5612 movement from the Tudor Pelagos for Breitling's Superocean Heritage watch, while in return Breitling produces the Tudor Calibre MT5813 movement for use in the new Tudor Heritage Chronograph, based on the Breitling B01.
Tudor produces variants of its 2015 "Manufacture Calibre": the MT 5601 was developed specifically for the Black Bay Bronze model and is slightly larger in diameter and displays hours, minutes and seconds functions, and the MT5602 was developed for the Black Bay and the Black Bay Dark models, and also displays hours, minutes and seconds.
Caliber MT5402 is a smaller and thinner version of the 5602, developed for the Black Bay 58 line. As of its release in 2018, it is only available without date display and carries the same specs of movement speed, material use, structure and power reserve as the 5602. As of 2021, it also exists as MT5400, a slightly modified size version for the Black Bay 58 models with open case back to fit the sapphire case-back size.
On May 25, 2021, Tudor announced their Manufacture Calibre MT5602-1U alongside their new Black Bay Ceramic timepiece. The movement is almost entirely black, with a black tungsten rotor, a 70-hour power reserve, and a silicon hairspring. It is the company's first METAS Master Chronometer timepiece, able to function within a tolerance range of 0/+5 seconds per day.[3]
Tudor in-house mechanical movements typically function within a tolerance range of -4/+6 seconds per day. This average daily rate level is in line with COSC Chronometer standards, which Tudor often certifies its movements to.
Fabric straps
Fabric straps were used by NATO forces from the mid-twentieth century as a functional and hardwearing alternative to leather and metal watch bracelets; however, the two-piece strap now known as the "NATO strap" debuted in the British Ministry of Defence in 1973. Military watch bands had to be hardwearing and secure, and with the additions of spring bars and an added nylon strap, the NATO strap provided the best security. They were also used by many professional divers, since leather straps do not suit water, and they could be adapted to fit over a diving suit more easily than metal bracelets. The NATO strap was initially only available in a 20mm wide ‘Admiralty Grey’ nylon variety, but as the style gained popularity, the different British military regiments began producing straps in all manner of regimental colors. Over time, military men began to customize their watch straps, taking on the colors of the regiments they were in, creating the colorful stripes NATO straps are now often known for.
In the early 2000s, sports watches with fabric straps became popular. At the 2010 launch of the Heritage Chrono watch, Tudor supplied both a metal bracelet and a fabric strap with the watch. Tudor's fabric straps are woven by a passementerie manufacturer near St.-Etienne, the centre of French silk weaving since the 15th century. The same firm also makes ribbons for Vatican medals as well as decorative trimmings for haute couture houses, including Chanel.