Astronaut Christina Koch spotted wearing a Breitling

NASA astronaut Christina Koch received the Congressional Space Medal of Honor wearing a Breitling Navitimer Cosmonaute Ref. A18061, a timepiece with a storied connection to space exploration. The chronograph, visible on her wrist in formal dress uniform, represents one of horology's most historically significant tool watches, linking modern space missions to the earliest chapters of human spaceflight.

The Breitling Navitimer Cosmonaute Ref. A18061 is built around the Venus calibre 178, a hand-wound movement known for its robustness and reliability in extreme environments. The 41.8 mm stainless steel case houses a distinctive 24-hour dial—a feature born from early astronaut feedback that standard 12-hour markings created confusion during orbital missions where day-night cycles no longer apply. The chronograph offers 30-minute and 12-hour totalizers, a small seconds sub-dial, and a telemeter scale on the outer edge. Water resistance reaches 100 metres, sufficient for ground operations and emergency scenarios. The watch sits on a black leather strap with a steel pin buckle, visible in the sighting.

The 24-hour dial variant distinguishes the Cosmonaute from other Navitimer references and appeals to collectors devoted to space-qualified horology. Breitling produced the A18061 across multiple decades, with variations in dial printing, lume colour, and case finishing. The Cosmonaute name itself invokes the Soviet term for cosmonaut, reflecting Cold War-era space competition and the watch's truly international appeal among flight crews and mission specialists.

Christina Koch flew on Expedition 59–60 aboard the International Space Station and logged over 328 days in space—more than any other woman in history. Her choice of the Cosmonaute for this honour reflects professional affinity; astronauts favour tool watches with proven spaceflight pedigree. The Breitling Navitimer Cosmonaute remains standard-issue for many space agencies and has flown on numerous shuttle and ISS missions since its introduction.

On the grey market, the A18061 trades between $4,500 and $6,500 depending on condition, dial variant, and provenance. Retail pricing for modern Cosmonaute references hovers around $7,000–$8,000. Vintage examples with original dials and full service history command premiums, particularly those with documented space-agency connections or flown heritage.