Tough to acquire vintage signature in black fountain pen, dated October of 1906, on a roughly 1.5 x 6-inch uneven clip from a letter. In good condition, with very light staining along the bottom edge. Scottish-American industrialist and philanthropist Andrew Carnegie led the expansion of the U.S. steel industry in the late 19th century and became one of the richest Americans in history. He went on to become a leading philanthropist in both the States and in Great Britain.

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