STS-51-I was the 20th mission of NASA's Space Shuttle program and the sixth flight of Space Shuttle Discovery. During the mission, Discovery deployed three communications satellites into orbit. The mission launched from Kennedy Space Center, Florida, on 27 August 1985, and landed at Edwards Air Force Base, California, on 3 September.
The Swissartex is virtually identical to the A-B Emblem version, however some suble differences exist. The "Y" in Covey is taller than the preceding "E", the stars tend to crowd in to the "NG" in Engle and the stars are ever so slightly larger.
For this Swissartex STS-51I patch there are two versions manufactured by Swissartex Emblem Inc. A waxy matt plastic coated backing, or a vacuum sealed backing. The modern version of this patch is manufactured by Eagle Crest Emblem Inc. of Taiwan, which has a clear shiny plastic coated backing.