Scarce set of three Lunar Equatorial Zone charts, each scale 1:2,500,000, 38.25 x 14.5, dated December 1968, with charts featuring lunar terrain identified as ‘Earthside,’ sheet 1 of 4, ‘Eastern Limb,’ sheet 3 of 4, and ‘Western Limb,’ sheet 4 of 4. All maps were prepared by the Army Map Service for the Mapping Science Laboratory, NASA, Manned Spacecraft Center from Lunar Orbiter photography. Rolled and in overall very good to fine condition, with multiple vertical folds, and some staining and creasing to sheet four. From the personal collection of Paul Kruppenbacher, a member of the NASA Houston Landing and Recovery Division who trained Apollo astronauts in water recovery procedures and was deployed on U.S. Navy aircraft carriers for crew and spacecraft recovery operations.