COLONEL ROBERT OVERMYER - FIRST DAY COVER SIGNED CO-SIGNED BY: JOHN S. BULL, JOHN "ANTHONY" LLEWELLYN, F. CURTIS MICHEL, COLONEL DONALD H. PETERSON, COLONEL HENRY "HANK" HARTSFIELD JR. - HFSID 48196

BOB OVERMYER CO-SIGNED BY ANTHONY LLEWELLYN, HANK HARTSFIELD, DON PETERSON, JOHN BULL, AND F.C. MICHEL
Six NASA astronauts signed a first day of issue envelope honoring the Apollo Soyuz Space Mission
First Day Cover Signed: "Bob Overmyer", "Anthony Llewellyn", "Hank Hartsfield/NASA Astronaut", "Don Peterson", "John Bull" and "F. C. Michel", 6½x3½. First day cover of the ten-cent Apoll Soyuz Space Mission stamp, postmarked Kennedy Space Center, Florida, July 15, 1975. Colonel Bob Overmyer flew as a pilot in the STS-5 (1982) and as commander on the STS-51-B (1985). He also was named lead investigator for the Challenger disaster in 1986. Anthony Llewellyn (1933-2013) was a chemist and NASA astronaut, first selected to join the NASA astronaut program as a space candidate in 1967. As a member of Astronaut Group 6, he participated in flight training but ultimately quit the program in 1968 when he couldn't pass the rigorous flight training requirements, particularly the "flying blind" test. Instead, he began teaching at the University of South Florida, where he conducted groundbreaking research in bioelectrochemistry, designing monitoring instruments for living human tissue. Hank Hartsfield (1933-2014) flew on three spaceshuttle missions in three different shuttles: Columbia (June 27-July 4, 1982), Discovery (August 30-September 6, 1984) and Challenger (October 30-November 6, 1985). Don Peterson (b. 1933) is a West Point graduate who was selected to become a NASA astronaut in 1969. After serving as a support crew member for Apollo 16 (1972), he served as a mission specialist on STS-6 in 1983, conducting experiments and testing new equipment. John S. Bull (1934-2008) was selected as a NASA astronaut in 1966 after he served nearly ten years in the U.S. Navy. He resigned from NASA in 1968 after being diagnosed with pulmonary disease, making him automatically ineligible to travel to space. Bull went on to earn a Ph.D. from Stanford University and he rejoined NASA to conduct research from 1973-1985. F. Curtis Michel (1934-2015) was selected by NASA as a candidate in 1965 for the Apollo missions into space. He resigned from NASA in 1969 to return to teaching at Rice University once he discovered he would not be assigned to a mission. His time at NASA was sandwiched between years spent teaching at Rice University, where he retired in 2000 after 37 cumulative years. Fine condition.