We are excited to offer this stainless steel Omega Speedmaster Professional with the reference 311.30.42.30.01.005. This piece features Omega’s Cal. 1861 (base Lemania 1873), 12-hour chronograph, small seconds, NASA First Watch Worn on the Moon engraving, and a Hesalite crystal. This 42mm watch has a stated water resistance of 50m. This watch is unpolished and has marks and wear as expected for a preowned timepiece. The watch will be accompanied by its display box, card holder, International Warranty card (dated December 2018), Pictograms card, Medallion, 2 additional straps, Operating Instructions book, Speedmaster book, Moonwatch book and pin tool.