Omega and Bulova are the watches most often associated with early space flights, but it was Breitling that produced the first Swiss wristwatch to travel outside Earth’s atmosphere.
In 1962, NASA astronaut Scott Carpenter orbited the Earth three times during the Mercury-Atlas 7 mission, becoming only the second American to do so.

On Carpenter’s wrist was a custom-built Breitling Navitimer, featuring details he requested personally in a letter to Breitling’s then-CEO Willy Breitling.
The slide rule bezel was widened to allow easier operation with gloved hands, a stretch metal bracelet was added to fit over a space suit and the dial was adjusted to a 24-hour display.

That final request was the most challenging to accommodate, requiring a retooled manual movement, but Breitling delivered mere days before the Mercury-Atlas 7 launch.