BOSTON, MASS.- RR Auction, a Boston-based auction house, is thrilled to announce the sale of Richard Gordon's 18K gold Omega Speedmaster Professional for $138,908.

This exquisite timepiece is part of Omega's limited 'Tribute to Astronauts' series, which consists of only 26 watches. Each is uniquely numbered and features special engravings that reflect the astronaut's significant contributions to space missions.

Marked as "No. 20," Gordon's watch includes an engraving that reads, "Astronaut Richard R. Gordon, Gemini 11 - Apollo 12," along with a quote celebrating humanity's space achievements: "To mark man's conquest of space with time, through time, on time." The design features a burgundy-red aluminum inlay on the gold bezel, onyx hour markers, and a Lemania-based copper-colored chronograph caliber 861, enclosed in a 42mm gold case.

"Richard Gordon's Omega Speedmaster is not just a watch; it's a testament to the enduring spirit of human exploration and a remarkable piece of history," said Bobby Livingston, Executive Vice President at RR Auction. "Its sale highlights the continuing fascination with space history and the achievements of astronauts."

The Space Exploration and Aviation auction, which began on March 25 and concluded on April 25, also featured other notable items:

• Apollo 11 Flown Command Module Rotational Hand Controller sold for $437,034.

• A flown Apollo 13 Lunar Module Contingency Checklist Page sold for $35,342.

• An Apollo Display and Keyboard Assembly (DSKY) sold for $87,175.

• A Lunar Surface-Used Rover Map from Apollo 17, signed by Gene Cernan, sold for $44,745.

• Andrey Borisenko's ISS Expedition Flown Omega Speedmaster Pro Watch sold for $44,291.