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

so this is a perfect alternative

Apollo 17 FLOWN AROUND THE MOON (Lunar Orbit) mission beta cloth patch – ex Gene Cernan collection

He received the NASA Distinguished Service Medal in 1962

80 kg) of Moon rocks and deployed several experiments

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 !