这是附加信息
 
     
       REFERENCE 
     
 
     
       116508 
     
 
    
       MODEL CASE 
     
 
     
       Oyster, 40 mm, yellow gold 
     
 
    
       BEZEL 
     
 
     
       Fixed, with engraved tachymetric scale, in 18 ct yellow gold 
     
 
    
       WATER-RESISTANCE 
     
 
     
       Waterproof to 100 metres / 330 feet 
     
 
    
       MOVEMENT 
     
 
     
       Perpetual, mechanical chronograph, self-winding 
     
 
    
       CALIBRE 
     
 
     
       4130, Manufacture Rolex 
     
 
    
       POWER RESERVE 
     
 
     
       Approximately 72 hours 
     
 
    
       BRACELET 
     
 
     
       Oyster, flat three-piece links 
     
 
    
       DIAL 
     
 
     
       Black set with diamonds 
     
 
    
       CERTIFICATION 
     
 
     
       Superlative Chronometer (COSC + Rolex certification after casing) 
     
 
    
 
       
        Black dial 
      
 
      
        This model features a black, diamond-set dial with snailed counters, gold applique hour markers and hands with a Chromalight display, a highly-legible luminescent material. The central sweep seconds hand allows an accurate reading of 1/8 second, while the two counters on the dial display the lapsed time in hours and minutes. Drivers can accurately map out their track times and tactics without fail. 
      
 
     
 
       
        The tachymetric scale 
      
 
      
        With its tachymetric scale, its three counters and its pushers, the Cosmograph Daytona was designed to be the ultimate timing tool for endurance racing drivers. The bezel features a tachymetric scale to read average speed over a given distance based on elapsed time. This scale offers optimal legibility, making the Cosmograph Daytona the ideal instrument for measuring speeds up to 400 units per hour, expressed in kilometres or miles. 
      
 
     
 
       
        18 ct yellow gold 
      
 
      
        By operating its own exclusive foundry, Rolex has the unrivalled ability to cast the highest quality 18 ct gold alloys. According to the proportion of silver, copper, platinum or palladium added, different types of 18 ct gold are obtained: yellow, pink or white. They are made with only the purest metals and meticulously inspected in an in-house laboratory with state-of-the-art equipment, before the gold is formed and shaped with the same painstaking attention to quality. Rolex's commitment to excellence begins at the source.