Two items: limited edition presentation comprising a swatch of unbleached Teflon, the same material used in the Apollo communication’s headset, affixed to a color 8 x 10.5 explanatory sheet numbered 91/2500, signed in blue felt tip “Edgar Mitchell”; and a similar presentation, including two swatches of the type of Mylar used in Skylab’s sunshade, numbered 78/2500, signed in blue felt tip “Alan Bean.” Each item is matted to an overall size of 11 x 14 and sealed in removable plastic. In very fine condition. Pre-certified Scott Cornish and RR Auction COA.