40MM Milgauss 116400GV (2009) Pre-Owned RolexThe Rolex Milgauss 116400GV is the 40mm Oystersteel Milgauss distinguished by its green sapphire crystal, with the GV suffix derived from Glace Verte (green crystal). Originally introduced in 1956 for scientists and engineers working in high magnetic environments, the Milgauss is engineered to resist magnetic fields up to 1,000 gauss through the use of an internal ferromagnetic shield surrounding the movement. The black dial features applied 18k white