The Moonwatch: Timing the Space Race

On July 20, 1969, Neil Armstrong and Buzz Aldrin became the first humans to land on the Moon. Strapped to the outside of Aldrin’s spacesuit was an Omega Speedmaster Professional—the only piece of equipment to go from the Earth’s surface to the lunar surface that wasn't custom-built by NASA.

NASA's Grueling Tests

In 1964, NASA sent out a request to several watch companies for chronographs to be used by the Apollo astronauts. The watches were subjected to what were essentially "torture tests":

• Temperature: 48 hours at 71°C, followed by 4 hours at 93°C.
• Vacuum: 12 hours at high altitude.
• Vibration: 3 cycles of 30 minutes at high intensity.
• Shock: Six shocks of 40 Gs in six different directions.

The Omega Speedmaster was the only one to survive with all its functions intact.

The Apollo 13 Lifeline

The Speedmaster’s legendary status was cemented during the Apollo 13 mission. When an oxygen tank exploded, the crew had to power down their onboard computers to save energy. To return to Earth, they had to perform a critical 14-second engine burn to correct their trajectory. Astronaut Jack Swigert used his Speedmaster to time that burn to the fraction of a second. It saved their lives.

Manual Wind in Zero Gravity

The original "Moonwatch" was a manual-wind mechanical watch. NASA preferred manual winding over automatic because they weren't sure how the self-winding rotor would behave in zero gravity (though later tests showed automatic watches work fine).

Conclusion

The Omega Speedmaster remains the most thoroughly tested watch in history. It represents a moment when human-made mechanical precision was the last line of defense against the vast, inhospitable void of space. On the Epoch Clock, you are seeing a digital count that would have been a luxury in 1969—a reminder of how far our precision has come.