This official Mercury FDC contains artifacts from every manned Mercury flight on one single cover :

Its crew comprised:

It was retired in 1937

Gemini 3-12 flown artifact 8x10'' presentation containing flown heatshield fragments from all manned Gemini flights

Each artifact was flown on its respective Apollo flight - the Apollo 16 netting is lunar dust stained (visible under a 60x microscope) and from the personal collection of Charlie Duke

Nicolai Budarin – FLOWN Mirror Soyuz TM-21 USA This official Mercury FDC containsCosmonaut Nicolai Budarin flown and used Sokolsuit wrist mirror on the first docking Shuttle MIR Soyuz TM 21. Historic flight ! Comes with separate COA by Alacona.