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In 2022, to mark the 70th anniversary of the British North Greenland Expedition, TUDOR presented the Ranger model, a tool watch celebrating the spirit of this daring adventure, complete with Manufacture Calibre MT5402, a 39-millimetre case and a clasp with rapid adjustment system.
THE RANGER SAGA
The history of the Ranger name dates back much further than the British North Greenland Expedition. Although the TUDOR watches used by its members from 1952 to 1954 never bore this inscription on their dials, subsequent Ranger models have perpetuated the concept of the expedition watch, a robust, practical, and affordable instrument, born at TUDOR during this time.
The British North Greenland Expedition represented a seminal moment for TUDOR and its tool watches. In fact, this was one of the very first long-term tests, under real-world extreme conditions, implemented by the brand.

The members of the expedition monitored variations in the precision of their Oyster Prince watches compared to the hourly signals emitted by the BBC, and recorded them in notebooks specifically provided for this purpose.
In light of the expected temperatures, the TUDOR watches sent for this project were specially lubricated with “arctic” oil and provided with bracelet extensions so the watches could be worn over the sleeves of the parkas.

Upon returning from Greenland, one of the members of the expedition wrote in a letter to TUDOR, which has been preserved in the brand’s archives, that his watch “maintained remarkable precision” and that “at no time did it need to be rewound by hand”.
STATE-OF-THE-ART WATCHMAKING TECHNOLOGY AND HISTORIC AESTHETICS
MANUFACTURE CALIBRE MT5402
The Ranger model is equipped with Manufacture Calibre MT5402. Thanks to this balance and the non-magnetic silicon balance spring, the Manufacture Calibre MT5402 has been certified as a chronometer by the Official Swiss Chronometer Testing Institute (COSC), with its performance going beyond the standards set by this independent institute.

In fact, where COSC allows an average variation in the daily running of a watch of between -4 and +6 seconds in relation to absolute time in a single movement, TUDOR insists on between -2 and +4 seconds’ variation in its running when it is completely assembled.

Another notable feature is that the power reserve of the Manufacture Calibre MT5402 is “weekend-proof”; that is to say about 70 hours, which enables the wearer to take the watch off on a Friday evening and put it back on again on Monday morning without having to wind it.
Case and Bracelet
The case and the bracelet are satin-brushed, creating an overall matt finish. Some elements, however, are polished to strengthen the lines of the case, including the inner edge of the bezel.
Hour Markers
Dial with Arabic numerals at 3, 6, 9 and 12 o’clock and hour markers painted with grade A Swiss Super-LumiNova® luminescent material.
Hands
The arrow-shaped hands, rounded for the hours hand and angular for the seconds hand, with a novel touch, the tip of the seconds hand in burgundy.
APPRECIATION
RANGER
The 21st century expedition watch
M79950-0001
39mm steel case
Steel bracelet
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M79950-0002
39mm steel case
Hybrid rubber and leather strap
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M79950-0003
39mm steel case
Green, red and beige fabric strap
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Five year Guarantee
Five-year transferable guarantee with no registration or periodic maintenance checks required
Case
39mm steel case, satin finish
Movement
Manufacture Calibre MT5402 (COSC)
Self-winding mechanical movement with bidirectional rotor system
Power Reserve
Power reserve of approximately 70 hours
Winding Crown
Screw-down winding crown in steel with the TUDOR rose in relief
Waterproofness
Waterproof to 100m (330 ft)
Bezel
Smooth satin-brushed steel
Dial
Black, domed
Crystal
Domed sapphire crystal
Bracelet
Steel bracelet with three links and a folding clasp with the TUDOR “T-fit” safety catch
Hybrid rubber and leather bracelet with folding clasp and steel safety catch
Green fabric bracelet with red and beige stripes and buckle