Apollo 9 launch, with official NASA/KSC cachet, signed by James McDivitt, David Scott & Rusty Schweickart.
Apollo 9 "Orbit Covers" postmarked on launch day, signed by James McDivitt, Rusty Schweickart & David Scott.
Apollo 9 prime recovery ship cover with USS Guadalcanal ship's cachet. There are 2 variations of the ship's postmark and this one has the "USS Guadalcanal" appears on the top.
Apollo 9 prime recovery ship USS Guadalcanal Beck printed cachet cover. This postmark has the "USS Guadalcanal" appears at the bottom.
Apollo 9 prime recovery ship USS Guadalcanal with a "U.S. Navy Recovery Force" cachet similar to those found on Apollo 7 recovery cover.