– Reference Number: 6536 - Serial Number: #2299xx – Production Years: 1956 (Approx.) – Case Size: 37mm – Materials: Stainless Steel – Functions: Time w/ Running Seconds – Dial: Black w/ Luminous Hour Markers (Gilt) – Bezel: Long 5 insert circa 1960s, Bidirectional, Black Aluminum Insert w/ 60-Minute Scale – Crystal: Acrylic (Domed) – Movement: Rolex Caliber 1030 – Water Resistance: 100 Meters / 330 Feet – Strap/Bracelet: Oyster Bracelet (Stainless Steel) The reference 6536 is one of these early models that first appeared around 1956 (although some of the earliest examples are believed to have been made in 1955) but was discontinued before the end of the decade. Produced for only a couple of years during the 1950s, the Rolex Submariner 6536 is one of the very earliest iterations of the brand’s iconic dive watch and despite its remarkably short production run, a surprising range of variations exists within this single reference. Although it is not the most famous vintage Rolex Submariner (that honor would likely go to the ref. 6538, which was worn by Sean Connery in the original James Bond films), the ref. 6536 is one of the most interesting vintage Rolex models to study and collect.