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This recent find comes from the Estate of Dr. Julian Davidson, a pioneer in missile and space defense spanning 60 years and instrumental in the Space Industry. He served as the Director of the "ABMDA" (Advanced Ballistic Missile Defense Agency) at Redstone Arsenal in the 1960's - 1970's. Listing includes a Set of 3 1960's Era Circular Slide Rules with Books/Cases with details for each below:

1960 GENERAL ELECTRIC DEFENSE ELECTRONICS DIVISION DIARY w/ Circular Slide Rule and includes attached (to inside back cover) 1959 Lunar Landscape and Solar System Photo/Map - Rule has pocket on inside front cover (see pictures 20-24)
1969 PROPERTY OF U.S. GOVERNMENT SAMA & ETANI Reference Tables and Circular Slide Rule with Original Case/Sleeve
1969 SAMA & ETANI Circular & CONCISE Slide Rule TAKEDA - PHILCO A DIVISION OF FORD MOTOR COMPANY - MODEL CTCS-552 - Slide Rule is still in original plastic bag and includes book and original case/sleeve

All items are in Very Good to Excellent overall condition with really the only wear being to the inside spine of the General Electric book - the spine has pulled loose from front cover, but the book is still fully together and spine could easily be glued back if you wish to do so (see picture 24). There are some handwritten notes in the calendar section of the book - see picture 19 as an example. Please see condition description and all Pictures... Note: International orders are subject to buyers Country charging tariff/customs fees upon entry - Not included in Purchase/shipping price for item. To see more Vintage/Antique Collectibles from this Estate, other Estates and several Picks, just visit my Store Link and Thank You for Looking!!!