US 2005
BARBARA McCLINTOCK (Geneticist), JOSIAH WILLARD GIBBS (Thermodynamicist), JOHN von NEUMANN (Mathematician), and RICHARD FEYNMAN (Physicist)
American Scientists
Self-Adhesive Gum
Scott 3906-09
Die Cut 10.75
Lower Right Stamp Plate Block - #S11111
Mint Never Hinged
