[Engraving and electrotypes in A manual of gold and silver coins of all nations, struck within the past century]

Eckfeldt, Jacob R. (Jacob Reese), 1803-1872. A manual of gold and silver coins of all nations, struck within the past century. Showing their history, and legal basis, and their actual weight, fineness, and value, chiefly from original and recent assays. With which are incorporated treatises on bullion and plate, counterfeit coins, specific gravity of precious metals, etc., with recent statistics of the production and coinage of gold and silver in the world, and sundry useful tables. By Jacob R. Eckfeldt and William E. Du Bois. Illustrated by numerous engravings of coins, executed by the medal-ruling machine, and under the direction of Joseph Saxton · 1842

"1 medal engraving from a daguerreotype, by Joseph Saxton, of the front of the Mint, using a medal ruling machine, to copy a relief executed by Christian Gobrecht from the daguerreotype...16 plates of coins ruled directly from electrotypes of them."--Hanson Collection catalog, p. 8