The Omega Speedmaster Moonwatch 311.30.42.30.01.005 is the definitive modern iteration of the legendary chronograph that earned its “Moonwatch” title by becoming the first watch worn on the lunar surface, faithfully preserving the design and spirit of the original that passed NASA’s rigorous testing. This 42mm stainless steel icon features the signature black step dial with applied Omega logo and luminous hour markers, paired with the classic dot-over-90 bezel configuration that enthusiasts cherish, all protected by a hesalite crystal that maintains authentic vintage appeal with its distinctive warm glow and slight distortion. Powered by the manual-winding Caliber 1861, this movement continues the legacy of the exact mechanism that operated flawlessly in space, offering the same column-wheel chronograph mechanism and 48-hour power reserve that proved reliable in zero gravity. The anodized aluminum tachymeter bezel shows the perfect matte black finish, while the luminous hands and Super-LumiNova coated markers ensure optimal readability in any conditions. Designed for professional use, this Speedmaster features the asymmetrical case with protected crown and pushers, maintaining the same dimensions and profile that made it suitable for space missions. The stainless steel bracelet with flat links and push-button clasp offers period-correct styling, completing the classic Moonwatch aesthetic. Every detail meets NASA’s original specifications, from the moonwatch-professional dial text to the 300m water resistance that far exceeds its space requirements. This reference represents the purest expression of Omega’s most famous watch – the only timepiece certified for extravehicular activity (EVA) and still flight-qualified by NASA today. For collectors and enthusiasts alike, this Speedmaster Professional offers an authentic piece of space history with the same mechanical integrity and design that made it an icon, making it one of the most important chronographs ever created and a cornerstone of any serious watch collection.