ROLEX Daytona Prototype « large Daytona » dial turned copper Ref. 6240 It is estimated that about 1.750 Daytona of the 6240 reference were ever produced. It was the only Daytona reference produced in just 1 metal (steel). The reason is simple: the 6240 is a true prototype. It was made to answer the demand from Rolex’s clients for a true waterproof Daytona. The manufacture went through an iteration process explaning the 3 dial variants. Serial: 1.659.xxx (1967) Dial: the large Daytona is the 2nd dial generation. Incredible what patina can do to sunray dials. This one turned into a warm copper tone. The edge of the dial between 2 and 4 o’clock shows multiple small marks possibly due to water in the past. The positioning of the luminous at 6h below the « T SWISS T » is matching the 1.6m serial. The thin hand for second on the 9 o’clock subregister is also typical and original for this reference. Tritium luminous all react well under the UV test (glow green & vanish quickly) for both dots and hands. Case: retains its original proportions and a good distance from the holes from the edges. The caseback is engraved 6240. Pushers: original MK0 « millerighe » matching the period and original crown with no dots Mouvement: Valjoux 722 and 5 lines engraved on the bridge are matching for the 1.6m serial. ROW on the bridge means the watch was exported in the USA. Bracelet: riveted oyster type 7205 although no engraving can be found on bracelet or end links. Clasp is from Q1 1964 (1 64) Box & Papers: none >> Rolex travel pouch This unique dial variation provides an immense extra soul to the watch.