Exceptional 55-card complete Topps "Astronauts" cards plus the 3-D viewer designed to bring the illustrations and graphics on the reverse into three-dimensional focus. An incredibly popular and historically important set issued during the "space race" while American Astronauts captured the imagination of youngsters across the country. Each of the original seven Mercury Astronauts (Scott Carpenter Gordon Cooper John Glenn Virgil Grissom Walter Schirra Alan Shepard and Donald Slayton) are featured on the cards along with images depicting training spacecraft and more. Overall grade is EX/MT with some exceptionally sharp higher-grade examples and some lesser. The tough checklist card grades VG/EX with the 3D viewer in EX/MT condition. 55 cards total plus viewer.