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Skylab mockup Smithsonian NASM. Skylab backup at the Smithsonian NASM en Quadell CommonsHelper took this picture on Sep hereby release it into the public domain Steven Williamson HiBBornotB talk September UTC HiBBornotB at org en HiBBornotB Original upload log page en SkylabmockupSmithsonianNASM HiBBornotB bytes