Own a piece of history... Rolexes legacy is as the leader of iconic technical tool watches having created many patented innovations including the screw down crown, anti-magnetic casing, helium release valve, the ratchet bezel... Created for scientists and nuclear physicists, and perfect for oncologists, radiologists and other professionals, the Milgauss was created to withstand high levels of electromagnetism,. due to the thicker diameter of its stainless steel watch case stainless Similar to the original Green Bezel "Kermit" Submariner, the Green Sapphire Crystal was introduced to celebrate the 50th Anniversary of the Milgauss. The lightning rod orange second hand along with its name, symbolize its anti-magnetic nature.