Robert Rodriguez and Tony Lopez Release

Late in 2015, Rob Rodriguez examined a 1792 Judd-9 silver disme, to be offered by Heritage Auctions in their January 2016 FUN sale. The piece was long dismissed as an impaired example, as early as 1864, when the dealer Edward Cogan noted Rodriguez, at the time a relative newcomer to the world of numismatics, looked at the coin with fresh eyes and somehow sensed there was more to be learned. Nearly a decade later, the circle is complete, and the whole story can now be told.

In the paper Rodriguez and Tony Lopez put forth a convincing case that this ostensibly damaged example served not only as a ten-cent pattern but also as a design template for the 1793 half cent. Their most powerful evidence derives from the coin itself, which gave up its secrets when subjected to X-ray micro diffraction via the Advanced Photon Source at the Argonne National Laboratory in Lemont, IL. Imperfections in the underlying crystalline lattice, imparted long ago by surface tooling, are visually translated, and startlingly so. Even readers who disagree with the conclusion reached by the paper will ignore the groundbreaking methodology at their own academic peril.

Rodriguez presented this research at the September 22, 2023 Coinage of Americas Conference (COAC) at the American Numismatic Society, and this paper will additionally appear in the COAC proceedings when they are published.

Link to on Newman Portal:
https://nnp.wustl.edu/library/book/637653