Portal:Anniversaries/December 9
- 1965 — American astronauts Frank Borman and James A. Lovell, Jr. orbit the earth 206 times in 14 days aboard Gemini VII. The astronauts wear Omega Speedmaster watches on the mission.
- 2014 — Omega and METAS announce the creation of a new chronograph standard, Master Co-Axial Officially Certified.