O Speedmaster Moonwatch Professional – Co-Axial Master Chronometer Chronograph 42 mm
Ref. 310.30.42.50.04.001

🔹 Overview
There are watches, and then there are legends. The O Speedmaster Moonwatch Professional belongs firmly to the latter. More than just a timepiece, it is a witness to history, a mechanical marvel that has stood on the wrists of astronauts, engineers, and visionaries – and was worn on the surface of the Moon itself.

🌌 A Heritage Written in the Stars
Since its official qualification by NASA in 1965 for all manned space missions, the Speedmaster has become synonymous with space exploration. It accompanied every Apollo mission, including Apollo 11 in 1969, when Neil Armstrong and Buzz Aldrin stepped onto the lunar surface – with an O Speedmaster on Aldrin’s wrist. Today’s model pays homage to that legacy, while incorporating O’s finest modern innovations.

✨ Iconic Design, Reimagined
The 42 mm stainless steel case combines brushed and polished surfaces, playing beautifully with light on the wrist. Its white step dial is striking and contemporary, contrasted by blackened sub-dials for elapsed seconds, minutes, and hours.

The asymmetrical case, introduced in the 1960s to protect crown and pushers, remains faithful to its heritage. Surrounding the dial is the iconic black anodized aluminum bezel with tachymeter scale – a nod to the Speedmaster’s racing and timing roots.

⏱ Built for Extremes – Master Certified
Behind the sapphire crystal caseback lies the O Co-Axial Master Chronometer Calibre 3861. A manual-winding movement certified by METAS, it is resistant to magnetic fields up to 15,000 gauss and delivers the highest levels of precision, performance, and reliability.

• Caliber: O Co-Axial Master Chronometer 3861

• Winding: Manual

• Power Reserve: ~50 hours

• Escapement: Co-Axial

• Resistance: 15,000 gauss magnetic resistance

• Certification: METAS Master Chronometer

🔗 Bracelet for Modern Explorers
The stainless steel bracelet features brushed links and a redesigned clasp, offering strength, comfort, and O’s comfort release system for quick adjustments. It preserves the Moonwatch’s tool-watch character while adapting ergonomically to modern wear.

✅ Conclusion
Few watches carry the weight of history and the promise of the future like the O Speedmaster Moonwatch Professional. It is a testament to human ingenuity, a symbol of exploration beyond limits, and a companion for those who dare to go further. With bold aesthetics, a legendary background, and state-of-the-art movement, this Moonwatch is not just a chronograph – it’s a piece of the Moon, worn on your wrist.