Military watch collection: the Dirty Dozen, twelve watches that became historical benchmarks
In the world of military watch collecting, the “Dirty Dozen” occupy a special place. This nickname refers to twelve manufacturers that supplied the United Kingdom with wristwatches built to a common military specification at the end of the Second World War. Buren, Cyma, Eterna, Grana, IWC, Jaeger-LeCoultre, Lemania, Longines, Omega, Record, Timor and Vertex make up this group, which is now highly sought after by military watch enthusiasts. Around 150,000 examples are believed to have been delivered in total, although production was distributed very unevenly among the twelve manufacturers. These differences in production numbers, combined with condition and the authenticity of the components, account for some of the variations in value seen today.
Dirty Dozen: the origins of a military watch collection
The story begins in the final years of the Second World War. The British Ministry of Defence was looking for wristwatches suitable for military use. As British watch production was unable to meet demand sufficiently, the specifications were entrusted to Swiss manufacturers. Thirteen companies are believed to have been approached initially: the twelve manufacturers now associated with the Dirty Dozen, along with Enicar. As the latter ultimately did not supply watches for the programme, the historical group consists of twelve brands. Deliveries are mainly associated with 1945. These watches therefore appeared very late in the conflict, with some subsequently continuing their service with the armed forces after the end of the war.
Why the name “Dirty Dozen”?
Contrary to what its current popularity might suggest, Dirty Dozen is not an official military designation. The watches are historically associated with the W.W.W. specification, interpreted depending on the source as Watch, Wrist, Waterproof or Watch, Wristlet, Waterproof. The nickname “Dirty Dozen” emerged later among collectors as a collective term for the twelve manufacturers. The expression echoes The Dirty Dozen, the title of Robert Aldrich’s 1967 film, known in France as Les Douze Salopards. Above all, it provides collectors with a memorable name for a group of twelve watches sharing a common history and characteristics
W.W.W.: specifications designed above all for functionality
These military watches were not designed as prestige objects. Their design was primarily dictated by their function. The British specifications notably required a watch that was accurate, resistant to water and shocks, and sufficiently legible for military use. The dial had to be black with Arabic numerals, luminous hands and markers, a railway-style minute track and a small-seconds display. A shock-resistant crystal and a high-quality mechanical movement were also part of the specifications. This emphasis on functionality explains the aesthetic similarities between the twelve watches. However, they are not twelve strictly identical pieces: each manufacturer adapted the specifications to its own industrial capabilities, calibres and production methods. Cases, crowns, hands, typography and dimensions can therefore differ. It is precisely this combination of military standardisation and characteristics specific to each manufacturer that makes a complete collection so interesting today.
The Broad Arrow, a distinctive feature of British military watches
Another feature helps identify these watches: the Broad Arrow. This distinctive arrow, visible notably on the dial and caseback, indicated ownership by the British government. The caseback also bears military and W.W.W. markings, accompanied by identification numbers. These markings now play an important role when examining a vintage example. For collectors, a Dirty Dozen watch therefore cannot be identified solely by the name on its dial. Examining the caseback, numbers, movement, case and overall consistency of the watch helps document its origins.
The twelve manufacturers of the Dirty Dozen
The Dirty Dozen military watch collection consists of exactly twelve names:
- Buren
- Cyma
- Eterna
- Grana
- IWC
- Jaeger-LeCoultre
- Lemania
- Longines
- Omega
- Record
- Timor
- Vertex
The number of watches supplied by each manufacturer remains partly estimated. Archives provide more precise documentation for certain production runs, particularly those of IWC, Jaeger-LeCoultre and Omega, while figures attributed to the other manufacturers can vary depending on the source. One frequently cited estimate gives approximately 11,000 Buren, 20,000 Cyma, 5,000 Eterna, 1,000 to 1,500 Grana, 6,000 IWC, 10,000 Jaeger-LeCoultre, 8,000 Lemania, 5,000 Longines, 25,000 Omega, 25,000 Record, 13,000 Timor and 15,000 Vertex watches. These figures should therefore be regarded as historical estimates rather than a definitive inventory.
Buren W.W.W. military watch - Dirty Dozen
Cyma W.W.W. military watch - Dirty Dozen
Grana W.W.W. military watch — Dirty Dozen
IWC W.W.W. military watch - Dirty Dozen
Jaeger-LeCoultre W.W.W. military watch - Dirty Dozen
Lemania W.W.W. military watch - Dirty Dozen
Longines W.W.W. military watch - Dirty Dozen
Omega W.W.W. military watch - Dirty Dozen
Record W.W.W. military watch - Dirty Dozen
Timor W.W.W. military watch - Dirty Dozen
Vertex W.W.W. military watch - Dirty Dozen
Eterna W.W.W. military watch - Dirty Dozen
Grana: the piece that makes the collection difficult to complete
Among the twelve, Grana occupies a special position. Production estimates are significantly lower than those for Omega, Record or Cyma. Some sources suggest that only 1,000 to 1,500 examples were produced, while others put the figure as high as 5,000. This rarity explains why Grana is regularly considered the most difficult piece to find when a collector is seeking to assemble all twelve. As an illustration of the market, a Grana offered by Bonhams had been given an estimate of £15,000 to £20,000, while a Jaeger-LeCoultre Dirty Dozen offered in the same sale was estimated at between £2,000 and £3,000. These figures relate to a specific sale and, of course, should not be regarded as permanent market values.
What is the value of a Dirty Dozen watch?
There is no single price for a Dirty Dozen. The manufacturer matters, but the value of an individual watch also depends on its condition, degree of originality and the consistency of its components. Rarity naturally plays an important role. A Grana appears far less frequently than an Omega or a Record. However, a more common watch preserved in particularly original condition can also attract considerable interest from collectors. The recent market provides an indication of this range. On 17 September 2026, an Omega Dirty Dozen dating from around 1945 sold for €3,640 at Dorotheum. The auction house noted, however, that the case and dial had been restored, an essential factor when interpreting an auction result. Another interesting reference came in November 2025, when a complete collection of all twelve Dirty Dozen watches sold for €26,300 at an auction in Germany, against an initial estimate of between €7,000 and €15,000. Once again, this was an individual result dependent on the specific characteristics of the lot.
Originality, restoration and provenance
Assessing a vintage military watch requires particular attention. These watches were intended to be used and maintained, rather than preserved in a box for several decades. Many therefore received replacement parts during servicing. Some also had their radium luminous material removed or replaced. Dials have been restored, cases polished and movements repaired. For a military watch collection, the most aesthetically attractive condition is therefore not necessarily the one with the greatest historical interest. Consistent patina and original components may be more desirable than extensive restoration, depending on the collector’s expectations. Military numbers and markings are also important elements to examine when assessing the consistency of a watch.
Military watches, but not dive watches
The term W.W.W. does include a requirement for water resistance, but the Dirty Dozen should not be confused with the military dive watches that followed. Their purpose was closer to that of a field watch: a legible, robust and accurate watch designed to accompany military personnel in a variety of operational situations. In particular, they do not feature the graduated rotating bezel that later became characteristic of modern dive watches. British military dive watches that appeared in subsequent decades represent another branch of military watchmaking history.
Why collect all twelve Dirty Dozen watches?
The distinctive nature of the Dirty Dozen ultimately lies in the very concept of the collection. Owning an Omega W.W.W. or a Longines W.W.W. already provides a tangible piece of British military watchmaking history from the end of the war. Bringing together all twelve adds another dimension: reconstructing a military programme through the interpretations of twelve different manufacturers. The task is made all the more complex by the significant differences in production volumes and by more than eight decades of use, repairs, losses and modifications, which have reduced the number of surviving examples that remain in historically consistent condition today. Around 150,000 watches are believed to have originally been produced by all the manufacturers combined. This pursuit explains why the term Dirty Dozen has become inseparable from the military watch collection. It does not simply describe a type of watch: it defines a specific historical group, with a clear origin, twelve manufacturers and a common set of specifications.
Dirty Dozen: a military watch collection in its own right
More than 80 years after they were made, the Dirty Dozen remain particularly clear examples of the principles that guided the design of a military watch: displaying the time clearly, operating reliably and withstanding demanding conditions of use. Their historical interest also lies in the diversity concealed behind a common set of specifications. An Omega, Grana, IWC or Vertex W.W.W. all responded to the same British requirements, yet each reflects the manufacturing capabilities and industrial choices of its maker. For collectors, the value of these watches therefore does not depend solely on the current prestige of the name displayed on the dial. Rarity, authenticity, condition, military markings, movement, provenance and historical consistency are all factors to consider. The Dirty Dozen thus represent a clearly defined chapter in the history of military watches and one of the few groups of watches whose very nature encourages collectors to seek out not just a single model, but all twelve.
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Editor: Éric Barse
Journalist, entrepreneur, and founder of the websites www.cafe-racer-only.com and www.scooter-3-roues.com, Eric Barse divides his time between his passions: motorcycles, travel, and watches. A graduate of the Saint-Cyr military academy and the 2nd RPIMA (Parachute Regiment) before pursuing a career in communications and digital media, he has a true passion for authentic watches that have accompanied his two-wheeled adventures for many years, from the Indian Ocean to Africa and Latin America!
