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Books about Eckfeldt:
[ A MANUAL OF GOLD AND SILVER COINS OF ALL NATIONS, STRUCK WITHIN THE PAST CENTURY: SHOWING THEIR HISTORY, AND... by Jacob R Eckfeldt (Feb 21, 2012)
[ NEW VARIETIES OF GOLD AND SILVER COINS, COUNTERFEIT COINS, AND BULLION: WITH MINT VALUES. ] BY Eckfeldt, Jacob... by Jacob R Eckfeldt (Feb 21, 2012)
A Brief Sketch of Jacob R. Eckfeldt, Assayer of the Mint of the United States, at Philadelphia by William E. Du Bois (1872)
Wiki information Eckfeldt:
John Adam Eckfeldt was a worker and official in the early days of the United States Mint. A lifelong Philadelphian, Eckfeldt served as the second chief coiner of the Mint, from 1814 until 1839. Eckfeldt's father owned a large smithy and involved...
Jacob Reese Eckfeldt was an assayer for the United States Mint in Philadelphia.