This is a British Army model Cyma W.W.W. “Dirty Dozen”, made in the 1940s, featuring a stainless steel 38mm jumbo waterproof case.
Among the W.W.W. series watches—also produced by brands like IWC, Jaeger-LeCoultre, Longines, and Omega—this model stands out as the largest, with a 38mm jumbo waterproof case.
It boasts a full stainless steel screw-back waterproof case with a dust cover, and a black gilt dial, with the logo and Broad Arrow mark all created using gilt printing techniques. It is equipped with the highly refined Caliber 234 movement, known for its elegant curves and gold chatons.
This is a high-quality military watch, and it's also highly recommended as a vintage watch for everyday wear.