Group lot of nine items signed in ballpoint or felt tip by Clyde Tombaugh: an 11 x 8.5 paperstock photo of the "Discovery of the Planet Pluto"; a philatelic souvenir sheet with printed statement from Lyndon B. Johnson headed, "Pioneer—Deep Space Probes"; a 2.5 x 3 paperstock photo of Tombaugh behind a microscope; a group of four commemorative and first day covers, with two also signed by James Christy and Robert Harrington, co-discoverers of the Pluto satellite Charon, and one also signed by Charles T. Kowal, who discovered the 2060 Chiron; and an ALS, one page, January 11, 1994, in full: "I get hundreds of requests for autographed photos. I cannot cope with it. I am enclosing a printed picture cut out of some old brochures." Tombaugh adds "Discovered 9th planet, Pluto, on 18 Feb. 1930" to each of the covers. In overall fine condition.
We use cookies on this site to improve your experience. By using this site, you accept our use of cookies. To learn more, please see our Privacy Policy.