Lopez, Tony
Co-author, 1792 Silver and Non-Silver Center Cents: A Study.
4 entries found
Displaying records 1 — 4
11/10/20171792 Silver And Non-Silver Center Cents: A Study
Visual and analytical study of various examples of the 1792 United States silver center cent (Judd-1), comparing the silver plugs in each.
6/29/2021The Continental Dollar, Coin or Medal?
This article argues that the Continental Dollar was struck as a coin and not a medal. The authors compare the Continental Dollar edge devices and compositions to that of other pieces struck in the same era. Extracted from The MCA Advisory, June 2021 (vol. 24, no. 2).
9/1/2021The Treaty of Paris, Betts-614: A Census Study
Census of known examples of the Betts-614 Treaty of Paris medal. Excerpted from The MCA Advisory, September 2021 (vol. 24, no. 3).
4/30/2024History Recovered: Saga of the 1792 Silver Disme
(Introduction) This paper is about a journey of discovery that entails the most extensive and intensive scientific examination ever conducted in the field of numismatics. The target of this groundbreaking investigation is a 1792 silver disme Judd-9, one of the great rarities from the 1792 US Mint pattern coinage. As a result of over 800 hours of investigations that included photographic analysis, the use of two types of scanning electron microscopes and a historic first for numismatics, the use of synchrotron-radiation-based X-ray micro-diffraction (μ-XRD) technique at the Advanced Photon Source (APS) of the Argonne National Laboratory (ANL) to recover images from the subsurface metal lattice over a period of nearly 2½ years, we conclude this coin is THE design work surface for one of the first two coins of the United States, a 1793 half cent. Additionally, we also believe it entails a potential love story.
