Signed First Day Cover. Banesh HOFFMANN.

Signed First Day Cover.

The noted physicist and mathematician collaborated with Albert Einstein on the classic "Gravitational Equations and the Problem of Motion" while at Princeton's Institute for Advanced Study, then in 1972 co-authored the biography "Albert Einstein: Creator and Rebel" with Einstein's secretary Helen Dukas; from 1937 through the late 1970s he taught at Queens College. Signed First Day Cover, 6½" X 3½", cancelled in Princeton, New Jersey on 4 March 1979 and with "First Day of Issue" boldly stamped. Single 15-cent "Einstein" stamp at upper right. Along the left side, vertically, Hoffmann signs boldly in black ballpoint. With small portion of original transmittal envelope. Item #24332

Price: $75.00

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