Rendezvous of Gemini 6 and Gemini 7 in Space - 3 riyal
The stamp commemorates NASA’s Gemini 6A–Gemini 7 mission, the first rendezvous of two crewed spacecraft. Gemini 7 launched on 4 December 1965 for a 14-day endurance flight; Gemini 6A followed on 15 December and closed to within a few feet of its sister ship later that day, proving the orbital-maneuvering techniques later required for Apollo lunar docking.