Astronaut Jonny Kim spotted wearing a Omega

NASA astronaut Jonny Kim was spotted wearing the Omega Seamaster Diver 300M Co-Axial Master Chronometer during his descent and landing in the Soyuz MS-27 capsule in Kazakhstan on September 12, 2024. Accompanied by Russian cosmonauts Sergey Ryzhikov and Alexey Zubritsky, Kim completed an eight-month mission aboard the International Space Station. The black-dialed dive watch, visible on his wrist in post-landing imagery, represents one of the most operationally significant watches in modern spaceflight.

The Seamaster Diver 300M ref. 210.30.42.20.01.001 houses the Omega Co-Axial Master Chronometer calibre 8800, a movement certified to withstand the extreme conditions of space. The 42 mm stainless steel case features a unidirectional ceramic bezel, applied lume-filled indices on a matte black dial, and a helium escape valve—critical for deep saturation diving but equally valuable in a pressurized spacecraft environment. Water resistance reaches 300 metres; the Master Chronometer certification guarantees accuracy of ±0 to +5 seconds per day, far exceeding the COSC standard. The three-link stainless bracelet includes solid end links and a diving extension strap to accommodate a pressure suit.

Omega's Seamaster Diver 300M has been the official timepiece of NASA since the 1990s, worn during spacewalks and critical operations on the Space Shuttle and International Space Station. The Co-Axial Master Chronometer variant, introduced in 2018, replaced earlier editions with a modernized movement and enhanced durability. This reference remains in continuous production and is the only model issued to active astronauts, cementing its status as a tool watch of uncompromised performance.

Jonny Kim, a former U.S. Navy SEAL and physician, has logged over 4,000 hours in space since his first mission in 2020. His choice of the Seamaster Diver 300M underscores NASA's trust in Omega's engineering and the watch's proven reliability in one of the most demanding environments known to mankind.

The Seamaster Diver 300M ref. 210.30.42.20.01.001 carries an official retail price of approximately $7,100 USD. Grey-market examples typically trade between $6,200 and $6,800, though the NASA-issue variant commands slight premiums among collectors. Current waitlists at authorized Omega retailers range from 12 to 24 months, reflecting continued demand for this professional-grade timepiece.