An authentic Omega Speedmaster Professional Moonwatch, a manual winding sports chronograph movement with 50-hour power reserve. Features include luminous black hour and minute hands, index hour markers with minute track on the outer tachymetric bezel, three sub-dials displaying seconds, minutes, and hours respectively. Equipped with an aluminum fixed bezel, sapphire crystal glass (scratch resistant), a polished stainless steel case measuring 42mm in diameter and 13.20mm thick. Includes a transparent case back and comes with the original black rubber strap secured by a polished stainless steel folding clasp. Rated for 50 meters / 165 feet water resistance and boasts a Swiss certified chronometer precision. Known also as model number 31032425004001.