Buren WWW British Army, original dial s/s case measures 36,5 mm screw back engraved. In the early 50s, the British Ministry of Defense established the specifications for a military wristwatch for soldiers. The specifications are known as WWW (Wrist Watch Waterproof). Twelve were the watchmakers who responded to the requirements of the ministry: Cyma, Eterna, Grana, Jaeger LeCoultre, Lemania, Longines, IWC, Omega, Record, Timor and Vertex. These twelve watches are known among collectors as the dirty dozen. The watch was recently serviced.Feel free to ask for any further information you may need. All our watches are 100% guaranteed original.