Three fragments from the X-15 experimental aircraft used for X-15 Flight 191 on November 15, 1967, which ended in tragedy when the plane broke apart in an atmospheric reentry accident. The fragments consist of a metal bracket, piece of glass, and a smaller remnant with rubberized coating on one side. Accompanied by a letter of provenance from R. G. Frazier, an aerospace archaeologist who recovered the specimens from the impact site. RR Auction COA.