John R. Sinnock

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John R. (Ray) Sinnock (1888 - 1947) was the eighth Chief Engraver of the United States Mint and designer of the Roosevelt dime and Franklin half dollar, among other U.S. coins. His initials "JS" on the dime can be found at the base of the Roosevelt bust. He also sculpted, although did not design, the Purple Heart medal.

Sinnock was born in Raton, New Mexico and was educated at the Philadelphia Museum School of Industrial Art.

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Preceded by:
George T. Morgan
Chief Engraver of the U.S. Mint
1925 - 1947
Succeeded by:
Gilroy Roberts