This Air-King dial features a distinctive black dial with a combination of large 3, 6 and 9 numerals marking the hours and a prominent minute scale for navigational time readings, It bears the name Air-King in the same lettering that was designed specifically for the model in the 1950s. With its 40mm case in Oystersteel, solid-link 7.75 in. Oyster bracelet, and distinctive black dial, the Air-King perpetuates the aeronautical heritage of the original Rolex.