The thing about military watches was that they got beaten up pretty badly. Not jus worn day and night, getting knocked on the door frame, scratched at the beach and shocked by a mis-hit seven iron on the 16th hole; but actually battered. The loss rate was high and the return-to-store rate low. During World War Two, this proved something of a dilemma for the military, in terms of acquiring watches in the numbers required. The solution was to provide a specification to a number of brands who could, through a concerted effort, make enough timepieces for the troops. Divide and conquer and all that. The most obvious example of this manufacturing model is the British WWW watches, known by collectors as the Dirty Dozen. In this case, 12 watch manufacturers got contracts to produce a field watch for the Brits, including Jaeger-LeCoultre, Record, Cyma, Lemania, Eterna and Longines. These last three also made watches for one of the smallest, but reputedly one of the best equipped forces, the Czechoslovakian Air Force.