Fiber inclusion errors occur when stray threads, hairs, fabric fragments, or other foreign materials become trapped within the substrate of Federal Reserve Notes during the papermaking process. These visually striking and often underappreciated errors occupy a fascinating corner of error note collecting, with some specimens commanding serious premiums among specialists.
Read More →Some of the rarest and most visually striking error notes in existence are not the result of a single printing mishap, but two independent defects that happen to interact on the same piece of paper. Understanding optical coincidence errors unlocks a fascinating corner of error note collecting where rarity compounds upon rarity.
Read More →Doubled serial number digit errors rank among the most visually dramatic and mechanically fascinating misprints in U.S. paper money collecting, yet they remain widely misunderstood even by experienced hobbyists. This guide breaks down exactly how these errors occur, how to authenticate them, and what the current market looks like from common examples to genuine showstoppers.
Read More →Series 1963 Federal Reserve Notes produced misalignment errors that rank among the most visually dramatic printing errors in mid-century American currency. This guide catalogs known shifted face printings by Federal Reserve district, with grading context, print run data, and market values to help collectors identify and price these scarce survivors.
Read More →Counterfeit error notes are flooding the collector market, with fake misaligned overprints, shifted seals, and simulated ink smears deceiving even experienced buyers. This guide breaks down exactly how these fakes are made, what authentic printing errors actually look like, and the specific tests you can run before spending serious money on any error note.
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