W.W.W. 'Dirty Dozen' British military - F 6401



Case material:

stainless steel

Case size:

37.5 mm




NATO strap


Time-only: Hours, Minutes, Sub-seconds


Unrestored dial

Water resistance:


 Stainless steel, military Longines W.W.W. wristwatch (Ref. F 6401). The Longines W.W.W. is part of a collective of twelve brands,  known as the 'Dirty Dozen', that produced watches for the British Ministry of Defence during the end of World War II.

W.W.W. was a designation by the British Ministry of Defence to classify the group of watches commissioned in 1944. The acronym stood for 'Watch, Wrist, Waterproof'.
The Longines is the second rarest of these watches after the Grana, with an estimated production of 5,000 pieces.

This particular example is  completely original, with all of the parts correct to the watch. The 37.5mm sizing of the watch contributes to the desirability of this Longines, as it was one of the biggest of the dozen. This, coupled with the characteristically stepped "Tre Tacche" case, makes an interesting modern look.

This Longines retains its original dial,  luminous material of hour dots and of the cathedral hands matches perfectly. Furthermore, the screw down case back of this watch is engraved with its associated numbers, broad arrow, and the W.W.W. designation. Notably, the case back engraving number matches the number engraved on the lug which makes for a very rare example; often the casebacks were chopped and changed by the MoD watchmakers. To find one with matching numbers such as this, does not come around very often.

Inside this Longines W.W.W. is the famous 12.68Z movement, and incredibly high-quality movement that  was chronometer graded.

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