DS, 5.5 x 3.25, a printed “Agreement on the Rescue of Astronauts, the Return of Astronauts, and the Return of Objects Launched into Outer Space” in postcard-like format, the “address” side bearing a Cape Canaveral postmark, an affixed illustration of Apollo 8, and the ink signatures of the Apollo 8 crew: William A. Anders (who adds, “Apollo 8”), Frank Borman, and Jim Lovell. In fine condition, with just a hint of soiling and small pencil notation to printed side. R&R COA.