Seamaster 300 165.024 — 165.024, British Ministry of Defence Issue

Mil-spec watches for the British armed forces: fixed bars between the lugs, encircled “T” for tritiumTritiumA radioactive luminous-paint ingredient used on many vintage watches after radium. On RAF IWC Mark 11 replacement dials, an encircled T identified the tritium specification. on the dial, military hands, a special bezelBezelThe frame surrounding the crystal at the front of a watch. and a screw-down crownScrew-down crownA crown secured to the case by a threaded connection, intended to improve sealing when screwed closed. It is unscrewed before winding or setting. Its presence alone does not establish a watch’s current water resistance., with branch code, issue number and year engraved on the back instead of the seahorse. Replaced by the Rolex MilSub from 1971.