Swiss. 18K Everose gold case. Black monobloc cerachrom bezel in ceramic. Random Serial Number. Everose gold was created and patented by Rolex and cast in its own foundry. The black monobloc Cerachrom bezel in ceramic features an engraved tachymeter scale. This watch is powered by calibre 4130, a self-winding mechanical chronograph movement entirely developed and manufactured by Rolex. The chocolate dial with black Arabic numbers, perfectly accents the rose gold case and black alligator strap. The Cosmograph Daytona, introduced in 1963, was designed to meet the demands of professional racing drivers. With its highly reliable chronograph and bezel with tachymetric scale, it allows drivers to perfectly measure average speeds up to 400 kilometres or miles per hour, as they choose. An icon eternally joined in name and function to the high‑performance world of motor sport. 40mm case diameter. The watch was found to be running at the time of cataloguing. It has not been tested for timekeeping accuracy and may require adjustment.