Rolex. Montre bracelet en acier antimagnétique mouvement automatique Rolex. A stainless steel automatic antimagnetic bracelet watch Model: Milgauss Reference: 116400GV Date: Circa 2008 Movement: 31-jewel Cal.3131 automatic Dial: Black, applied luminous filled baton hour markers, orange quarters, outer white minute divisions with orange five minute markers, polished baton hands with luminous inserts, orange lightning bolt centre seconds Case: Brushed and polished tonneau form, screw down back, inner cap, No.V771620 Strap/Bracelet: Fitted brushed and polished Oyster link Buckle/Clasp: Signed folding clasp stamped PJ01 Signed: Case, dial & movement Size: 40mm Footnotes: The name 'Milgauss' combines 'Mil', meaning a thousand, and 'Gauss' which is the unit for a measure of magnetism. Traditionally, most hairsprings are made of Nivarox which is susceptible to magnetism which has a detrimental effect on timekeeping. Now the Milgauss watch balance spring is made with Parachrom-Blu, which is unaffected by magnetism. Any watch that can withstand 4,800 A/m is considered 'antimagnetic'. This equals to approximately 60 gauss. The new Rolex Milgauss is rated to withstand 1000 gauss because of its new technology in encasing the movement in soft iron, also known as a Faraday cage. For further information on this lot please visit Bonhams.com