only 19 examples of this pioneering ISS correspondence are reported

Shepard and Mitchell also collected rock samples

From the Meteoritical Bulletin :

Flown artifacts from Apollo 8 are very rare and in demand

Hand-signed and certified by Charlie Duke

Al Worden – 64-C testpilots class groupsigned nicollier only 19 examples of thisFrom the Personal Collection of Apollo 15 Astronaut Alfred Worden Offered here is a remarkable vintage glossy group photograph, measuring approximately 11 x 8. 5 inches, depicting Alfred Wordens Test Pilot Class 64 C at the United States Air Force Aerospace Research Pilot School. This historically significant class photograph features several individuals who would later play important roles in American spaceflight history. Among those pictured is a