Magnetic Resistance The Milgauss is designed for scientists and engineers working in magnetic environments, offering exceptional resistance to interference. Its distinctive lightning bolt seconds hand and bold styling set it apart within the Rolex catalogue. Technical Assurance This 2015 model features an intense black dial within a 40mm Oystersteel case. The smooth, fixed bezel and Oyster bracelet with Easylink and Oysterclasp ensure a secure fit. Powered by the 3131 calibre, it offers a power reserve of approximately 72 hours.