![Item #54669 AOK; AUTOMATIC ORBIT KALCULATOR [CENTURY 21 WORLD'S FAIR, SEATLE, WA., 1962: ORBIT OF FRIENDSHIP 7 ON FEB. 20, 1962]](https://robertgavora.cdn.bibliopolis.com/pictures/054669.jpg?width=768&height=1000&fit=bounds&auto=webp&v=1704916034)
![AOK; AUTOMATIC ORBIT KALCULATOR [CENTURY 21 WORLD'S FAIR, SEATLE, WA., 1962: ORBIT OF FRIENDSHIP 7 ON FEB. 20, 1962]](https://robertgavora.cdn.bibliopolis.com/pictures/054669_2.jpg?auto=webp&v=1704916034)
AOK; AUTOMATIC ORBIT KALCULATOR [CENTURY 21 WORLD'S FAIR, SEATLE, WA., 1962: ORBIT OF FRIENDSHIP 7 ON FEB. 20, 1962]
Boston, MA: Wolf R&D Corporation, 1962. Slide Calculator. Fine. Item #54669
Slide calculator to determine position of Friendship 7 over the earth in 1962. 14 x 5 inches. Issued at the Worlds Fair, Seattle, 1962. Includes 10 page illustrated instruction manual. Slide calculator and manual are both fine, unused within a long well worn illustrated paper sleeve.
Price: $25.00