Check the listing for details. STS-37 Patch GRO Space Shuttle. Condition: New. Listed at 8.00 USD. For sale is a 3 l/2" patch ( laminated paper), peel off sticker, STS-37 . On the reverse side of the sticker it states "The principal theme of the STS-37 patch is the primary payload, Gamma Ray Observatory (GRO) and its relationship to the Space Shuttle. The Shuttled and the GRO are both depicted on the patch and are connected by a large gamma. The gamma symbolizes both the quest for gamma rays by GRO as well as the importance of the relationship between the manned and unmanned elements of the United States space program. The Earth background shows the southern portion of the United States under a partial cloud cover while the two fields of three and seven starts, respectively, refer to the STS-37 mission designation. This patch was designed by the crew of STS-37."