FIRST EDITION: Two large multicolor celestial charts/star maps of the northern & southern hemispheres, each with rotating star chart overlays. The charts measure 16.5 x 16.5 inches and are bound together on hardboard with a black and white pictorial cover; when opened, the Northern Hemisphere is on the left board, the Southern Hemisphere on the right board. Each has a rotating overlay. A detachable sleeve inside includes general instructions for using the rotating star chart as well as a full, 40pp instruction booklet; also included are planetary tables, another clear plastic rotating overlay, a small booklet on the moon, and a large map of the Northern & Southern Hemispheres. Hale Observatory. WorldCat notes only one other copy of this, that in a library in Germany. Near fine condition, appearing to have never been used. Due to size, additional shipping fee may be necessary. Feel free to inquire.