Here at Watch Collectors, we offer a wide range of preowned/second-hand Rolex Milgauss watches available to view in our Mayfair, London showroom or to order online straight to the comfort of your door. We offer a 14 Days Money Back Guarantee and a 24 Months Warranty on all our watches. Additionally, we buy, sell & part-exchange Rolex watches. The Rolex Milgauss is a reactionary invention by Rolex against the existing magnetic field which effects the reliability of a mechanical watch. Usually, a magnetic field of 50-100 gauss can interrupt watches’ trustworthiness. Thus, Rolex created the first watch which tackled this problem in 1956. Suitably, it was called the Milgauss: gauss for the magnetic field, and mil a reference to the French word mille which translates to ‘thousand’. The Oyster case contains a shield made of ferromagnetic alloys which protects the movement against magnetic intrusion.