Apollo 15 OPS beta cloth: Lunar surface + rover + deep-space EVA used 8x10 leonov Personally signed by Chuck Yeager

Personally signed by Chuck Yeager in black felt tip

Mir crews often spent many months in orbit

numerous individual dust particles may be observed

Only 30 such acrylics were made

ASTP cover with attached FLOWN Kapton foil from the capsule – numbered and certified on the backside

Apollo 15 OPS beta cloth: Lunar surface + rover + deep-space EVA used 8x10 leonov Personally signed by Chuck YeagerUsed 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