Other features indicating that this is a professional divers watch are the watertight screw-in crown, a screw-in case back and the helium escape valve, located at 10 oclock and embossed with “He”. The unidirectional rotating bezel has minute graduations for the first fifteen minutes, numbers for the subsequent ten-minute sectors and a luminous triangular marker at 12 o’clock. The Planet Ocean model is identified by its distinctive bezel, which recalls the original Seamaster 300 metre models, albeit with a choice between classic and highly contemporary interpretations of this historical theme. The Omega Seamaster Planet Ocean Casino Royale Limited Edition 2907.50.91 is a special version of the Planet Ocean 2900.50.91 that Bond wears in the movie Casino Royale.
