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ELMER A. SPERRY: (1860 - 1930) American engineer and industrialist, inventor of the gyroscopic co...

Currency:USD Category:Everything Else / Other Start Price:NA Estimated At:150.00 - 200.00 USD
ELMER A. SPERRY: (1860 - 1930) American engineer and industrialist, inventor of the gyroscopic co...
ELMER A. SPERRY: (1860 - 1930) American engineer and industrialist, inventor of the gyroscopic compass and stabilizer which revolutionized navigation, and the holder of over four hundred patents. T.L.S. on his personal letterhead, 1p. 8vo., Brooklyn, Nov. 3, 1915, to Herbert Gunnison of the Brooklyn Daily Eagle, thanking him for a clipping. Boldly signed and very good. $150-200