Postal cover with a stamped cachet honoring the 20th anniversary of NASA, postmarked October 1, 1978, signed in ballpoint or felt tip by five early NASA administrators: T. Keith Glennan, James E. Webb, Thomas O. Paine, James C. Fletcher, and Robert A. Frosch, with each adding their tenure dates. In fine condition. Accompanied by a full letter of authenticity from Zarelli Space Authentication. Originates from the collection of Bob McLeod.
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