Lot 464 Clyde W. Tombaugh

American astronomer (1906–1997) best known for discovering Pluto in 1930. Ballpoint signature, “Clyde W. Tombaugh, Discovered 9th planet, Pluto, on 18 Feb 1930,” on a light blue 5 x 3 card. In fine condition.
Important Notice ALS - Autograph Letter Signed
ANS - Autograph Note Signed
AQS - Autograph Quotation Signed
AMQS - Autograph Musical Quotation Signed
DS - Document Signed
FDC - First Day Cover
Inscribed - “Personalized”
ISP - Inscribed Signed Photograph
LS - Letter Signed
SP - Signed Photograph
TLS - Typed Letter Signed

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