The OPS supplies the EMU with oxygen purge flow and pressure control for certain failure modes of the PLSS or PGA during EVA

and the rigorous astronaut training program that supported NASA’s lunar exploration efforts

ATV-1 "Jules Verne" STS-126 FLOWN postcard

the Lunar Module Pilot on the mission

Triangle Apollo 14 flown Kapton foil material swatch mounted on an 8x10 presentation certified on the backside

Liwei Yang+ Alexei Leonov inperson autographs Jim McDivitt The OPS supplies the EMUExtremely rare inperson signature of Liwei Yang and Alexey Leonov, obtained by cosmonaut Treshev's son Alexey during the ASE congress in Beijing 2014. Comes with COA and further documentation !