Introduced in 1958 as part of their "Professional" line of watches, the vast majority Seamaster 300 were produced for the public market. From 1967 until approximately 1970, a very small batch was ordered by the British Royal Navy for military use with a number of special features set them apart from the regular production units.
The cases were delivered with fixed spring bars and dials featured a circle T, signifying the use of tritium for the dial and the hands. The crown was screw down as opposed to the snap down ones found on production versions. Casebacks were engraved by the British MOD with their own branch codes, unique issue number (each) and year of issue.
This military SM300 is a rare survivor and completely original down to the crazed plexi found from the original owner.
Watch is accompanied by an Extract from the Archives confirming date of production and delivered to the British Royal Navy