Roger Federer is a great Swiss (Basel) world tennis champion, nicknamed KING ROGER, as such he wears a watch with a "crown" on his wrist. Quella di ROLEX, il meccanismo segnatempo più ambito dagli sportivi al mondo. It is the crown of ROLEX, the timepiece mechanism most coveted by sportsmen in the world. Why? Because it is made of Oystersteel steel, the "steel alloy of the 904L family of steel, used in high technology, in the aerospace industry and in the chemical industry to guarantee maximum corrosion resistance." It is also particularly bright. Rolex uses the blue PARACHROM mechanical self-winding PERPETUAL movement, consisting of a paramagnetic spiral, so it is not influenced by magnetic fields and it is extremely resistant. Gold watches are in an 18ct alloy. in rose gold created and patented by the company: EVEROSE. The superlative chronometer has the official certification that guarantees the perfect functioning of the watch. In 2018 the Phillips Auction House presented a very rare ROLEX chronometer in Geneva, the SINGLE RED - SEA DWELLER Ref.1665, waterproof up to 610 m. diving, superlative for historic companies, awarded for CHF 700,000.00.