You're viewing a limited edition Apollo 11 50th Anniversary enamel pin which was made as a bonus gift for the Make 100: Apollo 11 Flight Plan Book reprint project on Kickstarter.com 

Only 200 of these pins were made so this is very collectible. The pin is 1 1/16 x 1 1/8" in size and features the command module zooming past the moon with three stars representing the three astronauts of the Apollo 11 mission: Neil Armstrong, Buzz Aldrin, and Michael Collins.