The reliability and precision of an ordinary mechanical watch can be affected by a magnetic field of 50 to 100 gauss. But many scientists are exposed to much higher magnetic fields during the course of their work. Rolex’s solution was the Rolex Milgauss, created in 1956, the first watch of its kind. Hence the name of the watch, mille being French for thousand. This Pre-Owned Rolex Milgauss Men's Watch comes equipped with a 39mm case, which houses the blue dial and hand-made automatic movement that provides the power. Attached to the case is a stainless steel bracelet, fitted with a folding clasp for added security on the wrist and has a water resistance of 100 metres.Pre-Owned Information Condition - Some signs of previous wear may be present on the watch.Packaging - Box and Paperwork Included. Warranty - 24 Month warranty provided. This Is an Image of the Actual Watch.