Stainless Steel head and bracelet, fixed tachymeter bezel, .925 silver embossed dial, manual wind (Cal. 1861), 12-hour chronograph, small seconds, Last man on the Moon engraving, 40th Anniversary limited edition of 1972 pieces, WR 50m, Ref. 311.30.42.30.99.002, warranty dated January 2021, 42mm, New in Box with Papers + BW Warranty