1958 Submariner 6536-1 OCC James Bond chapter ring, gilt dial, part of a small batch, serial 3062xx . It has a very rare dial with "Four Lines" above the 6:00 marker as opposed to the standard two. The additional lines, "Officially Certified Chronometer," also called "OCC," signify that the movement was officially tested and certified by the "Bureaux Suisses" (Swiss Institutes for Official Chronometre Adjustment Tests) for accuracy.
The brass bezel once had nickel plating that has oxidized or worn away with age. The Submariner 6536-1 uses the #16 crystal, the same reference that is used on all Small Crown Submariners except the Submariner 6536/8.
The luminous material on the dial and hands was manually applied Radium like most Small Crowns from the 1950s. Although it no longer glows in the dark, the Radium still has a distinct "speckled" glow when exposed to UV Light and has a relatively high Geiger reading as well.
The reference number 6536/1 is stamped inside the case back with a date code IV 58
The 6536-1 is powered by the Rolex 1030 Automatic Movement. The outer case back is flat. The watch is in overall well preserved condition, never polished.