Geometric Lathe Work on 19th Century US Currency: How Spirograph-Style Patterns Defeated Counterfeiters
The intricate rose engine and geometric lathe patterns woven into 19th century American banknotes were not merely decorative flourishes but sophisticated anti-counterfeiting technology that defined an era of currency design. Understanding these patterns helps collectors identify genuine notes, spot alterations, and appreciate why certain series command premium values today.
Read More →