Omega Seamaster Diver 300M Master Chronometer Nekton Edition, Ref: 210.30.42.20.01.002, 42MM Stainless Steel Case on Stainless Steel Bracelet, Self-winding movement with a Co-Axial escapement. Certified Master Chronometer, approved by METAS, resistant to magnetic fields reaching 15,000 gauss. Free sprung-balance with silicon balance spring, automatic winding in both directions. Special luxury finish with rhodium-plated rotor and bridges with Geneva waves in arabesque, Unworn with box and papers