Set of twelve covers signed by astronauts and crews from various Space Shuttle and Approach and Landing Test flights, including: STS-5; STS-8; STS-41-B; STS-51-J; a pair of covers signed by the American and German crews of STS-61-A; the first and second ALT crews of the Space Shuttle Enterprise (with two other covers signed by each respective crew); two covers individually signed by Richard Truly and Jerry Carr; and one other. In overall fine condition, with haloing to a few signatures.