Submariner A/6538 — UK Military Issue

Deep German-silverGerman silverA copper-based alloy containing nickel and zinc, used for movement plates, bridges and cocks. The name refers to its silvery appearance rather than sterling-silver content. Lange uses it untreated, allowing its surface to develop a warm patina; this should not be confused with gold plating. bezelBezelThe frame surrounding the crystal at the front of a watch. unique to this reference, fixed bars and UK Navy caseback markings. Some were later refitted with 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. circle-T “Burford” dials.