Space Autographs, Apollo Soyuz, Etc.

Space Autographs, Apollo Soyuz, Etc. An unusual lot that includes 1) A 1992 Russian Post Office presentation folder containing a sheet of Russian ASTP stamps (unsigned), along with two identical presentation folders issued in honor of the stmps, each signed by the US and Russian stamp artists plus the US and Russian Postmaster Generals as well as the astronauts/cosmonauts Titov, Slayton, Hartsfield, etc., 2) A 4c Project Mercury Postal Service Presentation folder signed by the Postmaster General, 3) three different Russian books signed by their cosmonaut authors and 4) three US envelopes signed by Deke Slayton. Nice condition overall.