Apollo 15 OPS mylar: Lunar surface + rover + deep-space EVA used 8x10 Flown memorabilia lunar dust remains extremely fine

lunar dust remains extremely fine

The combination of documented multi-flight history and established astrophilatelic provenance makes this far more than a collection of signatures

A historic space-flown cover carried aboard the Mir space station during the pioneering Soyuz TM-21 and Mir-18 expedition

Produced by Danbury Mint

They were joined aboard the station by the three resident Expedition 66 crew members:

Apollo 15 OPS mylar: Lunar surface + rover + deep-space EVA used 8x10 Flown memorabilia lunar dust remains extremely fineUsed during three Apollo 15 lunar EVAs and a deep space EVA Exposed to the lunar environment for more than 18 hours and deep space environment during mankind's first deep space EVA performed by Al Worden. The OPS supplies the EMU with oxygen purge flow and pressure control for certain failure modes of the PLSS or PGA during EVA. In the event of a PLSS failure, the OPS flow is regulated to 3. 7 + 0. 3 psid for 30 minutes to provide breathing oxygen to