COLONEL ROBERT OVERMYER - FIRST DAY COVER SIGNED CO-SIGNED BY: JOHN "ANTHONY" LLEWELLYN, COMMANDER DON L. LIND, F. CURTIS MICHEL, COLONEL DONALD H. PETERSON, WILLIAM E. THORNTON - HFSID 48200

ANTHONY LLEWELLYN CO-SIGNED BY BOB OVERMYER, DON PETERSON, WILLIAM THORNTON, F.C. MICHEL, AND DON LIND
Six NASA astronauts sign a first day of issue envelope commemorating the Mariner 10 Mission
First Day Cover Signed Envelope signed: "Bob Overmyer", "Don Peterson", "W. Thornton", "F. C. Michel", "Anthony Llewelyn ", and "Don Lind", 6½x3½. First day cover of the ten-cent Mariner 10 Space Mission stamp, postmarked Pasadena, California, April 4, 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. 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. William Thornton (1929-2021) flew on Challenger STS-8 (1983) and Challenger STS-51B/Spacelab (1985).Selected by NASA in 1967, he stayed with the government agency working on improving mechanical hardware for missions until he retired in 1994. As part of this research, he holds over 35 patents concerning medical, military, and aeronautical technology applications. 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. 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. Don Lind (1930-2022) is a NASA astronaut and physicist who was among the "Original Nineteen" selected for the Apollo program. He designed many of the tools used on the Apollo missions and went on the STS-51-B science mission in 1985. After his career with NASA ended in 1986, he taught at Utah State University for nearly a decade. Lightly worn at corners. Stamp remnant affecting two signatures. Otherwise, fine condition.