STS-51-D was the sixteenth flight of NASA's Space Shuttle program, and the fourth flight of Space Shuttle Discovery.[1] The launch of STS-51-D from Kennedy Space Center (KSC), Florida, on 12 April 1985 was delayed by 55 minutes, after a boat strayed into the restricted Solid Rocket Booster (SRB) recovery zone. STS-51-D was the third shuttle mission to be extended.
The Swissartex version has a merrowed edge all around and a stiched on tab. Some may have been recycled from the tab-less, cancelled STS-41F patches.
Swissartex Emblem Inc. also manufactured a one piece version of this patch but with a shiny vacuum sealed backing instead of the waxy matt plastic coated backing (second set of photos).
