So Rolex created a timepiece for scientists with replica watches sale the Milgauss that was resistant to 1,000 Gauss because of a soft iron core that shielded the movement. For this replica watches sale watch, Rolex wanted something a bit more genteel, yet still a professional watch. The Milgauss more or less had the existing Oyster case, but the dial was inspired by the original Rolex Oyster Perpetual rolex replica sale models with a lightning bolt seconds hand. It was in 1963 that Rolex launched the Oyster Cosmograph that would soon become the Rolex Oyster Cosmograph Daytona. Rolex had been producing chronograph models for at least 30 years at that rolex replica uk point but this was their first real racing world-inspired chronograph watch. No one really knows replica watches uk where the term "Cosmograph" came from, though it is Rolex-speak for chronograph.