Omega Speedmaster Professional Moonphase 3876.50.31

There is only one watch in the world for which a moon phase indicator can stand as an analogy of its history: the OMEGA Speedmaster Professional. As the only chronograph to be flight-qualified by NASA for manned space missions, it is the only watch ever to have been worn on the Moon. Today, over 30 years later, the Speedmaster remains a legend in watchmaking, its popularity unwavering amongst aficionados of classic timepieces.

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The Speedmaster Professional Moon Phase retains the essential characteristics of the original Speedmaster models, such as the stainless steel case with tapered, facetted lugs and the stainless steel bezel with black aluminium ring and tachometer scale for calculating speeds or other units per hour. The black dial, with luminous hour markers and hands, is also typical of the Speedmaster Professional, as are the chronograph counters at 3 o’clock and 6 o’clock and the continuous small seconds display are 9 o’clock. It is the presence of an additional sub-dial in the 12 o’clock position, however, that sets this watch apart from the standard Speedmaster Professional: it contains a moon phase display, with a silver moon in relief against a sky blue background and an additional hand which points to the date around the circumference of the moon phase sub-dial. As an extra touch of refinement, the classic Speedmaster Professional look is complemented by rhodium-plated steel rings surrounding the chronograph and small seconds counters.

The OMEGA calibre 1866 movement provides the functions for this Speedmaster and, like the original Speedmaster Professional movement, it is a hand-wound chronograph calibre. In addition to the chronograph function, which records elapsed times with an accuracy of 1/5th of a second, this movement can also display the date and the Moon’s 28-day cycle. It has a 45-hour power reserve and its elegant, rhodium-plated finish can be admired behind the transparent sapphire crystal on the case back. Surrounding the movement on the screw-in case back, which ensures water resistance to 50 metres, is an inscription that recalls the Speedmaster Professional’s heritage: “THE FIRST AND ONLY WATCH WORN ON THE MOON”. The OMEGA Speedmaster Professional Moon Phase is available with a matching stainless steel bracelet with safety fastening clasp or a black alligator leather strap with stainless steel foldover clasp.