Wikipedia:Today's featured list/April 18, 2016
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NASA space-flown Gemini and Apollo medallions were mission-specific commemorative medallions—often astronaut-designed—which were approved by NASA and carried aboard the mission spacecraft into orbit. Beginning with the first manned Gemini mission in 1965, commemorative medallions were prepared for the astronauts at their request. These were produced by a company only known as Fliteline and were struck either in a pewter-colored base metal, sometimes painted a gold color, or sterling silver, and were flown on all 10 manned Gemini missions. The Robbins Company of Attleboro, Massachusetts, was contracted in 1968 to produce commemorative medallions beginning with Apollo 7, the first manned Apollo flight since the Apollo 1 disaster. These were purchased by astronauts and support crew personnel at NASA Astronaut Flight Office, and a total of over 3,000 sterling silver Robbins medallions were flown into space across the 12 manned flights of the Apollo program. Some of these were later sold in public auction for up to $60,000. (Full list...)