Omega speedmaster moon

The Omega Speedmaster Moonwatch is the chronograph that accompanied Apollo 11 to the Moon, an icon of watchmaking and space exploration.

About this subject

The Omega Speedmaster Moonwatch, officially known as the Omega Speedmaster Professional, is a mechanical chronograph that gained worldwide fame as the first watch worn on the Moon. In 1969, during the Apollo 11 mission, Buzz Aldrin wore his personal Speedmaster (reference ST 105.012) while stepping onto the lunar surface. This achievement cemented the model as a symbol of precision and endurance under extreme conditions.

The Speedmaster's journey with NASA began in 1964, when the space agency conducted rigorous tests to select a reliable chronograph for astronauts. The Speedmaster was the only watch to pass all tests, including exposure to temperatures from -18°C to 93°C, shocks, vibrations, and vacuum. Since then, the watch has been used on every manned NASA mission, including spacewalks during the Apollo era.

Technically, the Speedmaster Moonwatch is powered by the manual-winding caliber 1861 movement (originally the Caliber 321), a column-wheel chronograph known for its robustness. Its 42 mm stainless steel case, black dial with subdials, and tachymeter bezel are iconic features. The crystal is Hesalite, used in early versions because it is less likely to shatter in a vacuum.

The term Moonwatch became so associated with the model that Omega officially trademarked 'Moonwatch'. Beyond its space legacy, the Speedmaster is one of the most collected chronographs worldwide, with limited editions and variations honoring specific missions. Its continuous production since 1957 demonstrates a timeless design that transcends generations.

Frequently Asked Questions

Why is the Omega Speedmaster called the Moonwatch?

The name Moonwatch comes from the fact that the Speedmaster Professional was the chronograph worn by Apollo 11 astronauts on the lunar surface in 1969. Omega officially trademarked the term for the model.

Which movement does the Omega Speedmaster Moonwatch use?

The current model uses the manual-winding caliber 1861 (successor to caliber 321), a column-wheel chronograph movement. Earlier versions used caliber 321, renowned for its reliability.

Was the Speedmaster actually tested by NASA?

Yes, in 1964, NASA subjected several chronographs to rigorous tests including temperature extremes, vibration, vacuum, and shock. Only the Speedmaster passed all tests and was selected for space missions.