Discover the fascinating world of mint error coins — some of the most sought-after rarities in numismatics. Our Error Coins section covers double dies, off-center strikes, clipped planchets, broadstrikes, die caps, and other production mistakes that make certain coins extraordinarily valuable. Learn how to identify error coins by type, understand what drives their premium over face value, and find out which errors consistently command the highest prices at auction. Explore famous errors like the 1955 Doubled Die Lincoln Cent, the 2004 Wisconsin Extra Leaf quarter, and modern mint mistakes still being discovered in circulation today. Whether you’re a seasoned error coin hunter or just learning to spot mistakes with a loupe, find expert guidance on collecting, grading, and valuing these one-of-a-kind numismatic treasures.
Ancient Roman Coins Coins minted 2,000 years ago — and still collectable today. Your complete guide to identifying, valuing, and collecting ancient Roman coins, from common bronze sestertii to rare gold aurei. Ancient Roman coins are one of the most accessible entry points in the world of ancient numismatics. Unlike many historical artifacts, Roman coins…
Philadelphia accidentally shipped dies without the required P mint mark in 1982 — creating the most sought-after modern Roosevelt dime error. Error Coin Value Guide The 1982 no mint mark Roosevelt dime is one of the most celebrated modern error coins in American numismatics. It came about through a simple but consequential oversight: in 1982,…
The 1970-S produced two distinct date hub varieties — and the Small Date is the one collectors want. Here’s how to tell them apart and what each is worth. Lincoln Cent Value Guide In 1970, the San Francisco Mint produced proof Lincoln cents using two different date hubs — one with a larger, higher-positioned date…
Strong doubling across LIBERTY, the date, and IN GOD WE TRUST makes the 1972 DDO one of the most visually dramatic Lincoln cent errors ever produced. Error Coin Value Guide The 1972 doubled die Lincoln cent is the strongest, most dramatic doubled die obverse produced after the famous 1955 and 1969-S examples. Unlike many doubled…
1955 Doubled Die Penny Value One of the most famous error coins in American history — and one of the few still found in old collections and estate sales. Here’s exactly what yours could be worth. FindRareCoins.com | Updated 2026 In the fall of 1955, something went wrong at the Philadelphia Mint. A working die…
Numismatic Errors & Varieties Error Coins: The Complete Collector’s Guide to Mint Mistakes What causes mint errors, how to identify every major type, which famous error coins command the highest values, and how to build a compelling error coin collection from scratch. In most industries, a manufacturing defect lowers the value of a product. In…
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