STS-51G - Unknown 3"

STS-51-G was the eighteenth flight of NASA's Space Shuttle program, and the fifth flight of Space Shuttle Discovery. The seven-day mission launched from Kennedy Space Center, Florida, on 17 June 1985, and landed at Edwards Air Force Base, California, on 24 June. Sultan Salman Al Saud of Saudi Arabia was on board as a payload specialist; Al Saud became the first Arab, the first Muslim, and the first member of a royal family to fly into space.[1] It was also the first Space Shuttle mission which flew without at least one astronaut from the pre-Shuttle era among its crew.

This is a 3-3.5" version of the STS-51G patch. Twill backing with white thread used for the contrails instead of light blue.