STS-51I - Unknown maker

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.

This is a modern-style embroidered patch, may have a bare cloth back.  Quality is not bad aside from the stitching joinging all letter elements. The bow shock line is very thin.