What is the purpose of regulating a mechanical watch?

... navigational time readings. It bears the name Air-King in the same lettering that was designed specially for the model in the 1950s. Black dial. Its distinctive black dial combines large 3, 6 and 9 hour numerals with a prominent minutes scale for optimal navigational time readings. The name 'Air-King' ... The Rolex Air-King pays tribute to the pioneers of flight and the Oyster's roles in the epic story of aviation. With its 40mm case in Oystersteel, ... ... navigational time readings. It bears the name Air-King in the same lettering that was designed specially for the model in the 1950s. Oystersteel. Rolex uses ... ... navigational time readings. It bears the name Air-King in the same lettering that was designed specially for the model in the 1950s. Air-King M126900-0001 ... ... navigational time readings. It bears the name Air-King in the same lettering that was designed specially for the model in the 1950s. Rolex Black dial - Swee ... Discover the Rolex Air-King 40 mm watch in Oystersteel at GASSAN, an Official Rolex Retailer authorised to sell and maintain Rolex watches. ... navigational time readings. It bears the name Air-King in the same lettering that was designed specially for the model in the 1950s. Black dial. Oystersteel. ... navigational time readings. It bears the name “Air-King” since the watch's launch in lettering that makes the model easily identifiable. ×. Request Pictures. ... navigational time readings. Rolex's symbolic crown is displayed in yellow on the dial, while the seconds hand and the name “Rolex” are green, echoing the ...