What Is CoinErrors?

CoinErrors is a modern reference catalog dedicated to helping collectors identify, understand, and classify U.S. Mint errors. Our goal is clarity: simple explanations, clean visuals, and consistent terminology that make error coins easier to recognize and evaluate.

Mint Errors Matter - Why Collectors Care

Mint errors are more than mistakes — they’re snapshots of the minting process.
Each error reveals something about how coins are made, how things can go wrong, and why certain pieces become rare or valuable.
Whether you’re new to collecting or refining your expertise, understanding errors is the key to spotting value.

The Penny Project - The 2001 Lincoln Cent: A Perfect Starting Point

We begin with the 2001 Lincoln cent because it offers a wide range of error types, from subtle die chips to dramatic off‑center strikes.
This set forms the foundation of the CoinErrors catalog, demonstrating how each error type is documented, described, and visually represented.

How the Catalog Works - A Consistent, Card‑Based System

Each error is presented using a standardized card format that includes:

• Clear imagery

• Error classification

• Description and diagnostics

• Rarity indicators

• Value considerations

This structure keeps the catalog, comparable, and collector‑friendly.

Explore Error Types - Common Error Categories

The catalog organizes errors into intuitive groups, including:

• Die cracks & chips

• Off‑center strikes

• Cuds & retained cuds

• Broadstrikes

• Wrong planchets

• Double strikes

• Die clashes

• Struck‑through errors

Each category will expand as the catalog grows.

What’s Coming Next - Future Expansion

CoinErrors will continue to evolve with:

• Additional years and denominations

• More detailed diagnostics

• Expanded visual examples

• Collector tools and guides

• A full taxonomy of U.S. Mint error types

This is the beginning of a long‑term, reference‑grade project.

Project Status: CoinErrors is actively evolving.
Content and structure may change as the catalog expands and new examples are added.

Coin Errors is a modern reference catalog designed to help collectors identify,
understand, and compare U.S. Mint errors with clarity and confidence.

The project focuses on clean structure, consistent terminology, and visual examples that make error coins easier to recognize and evaluate. Whether you’re studying a single coin or exploring patterns across years, CoinErrors provides a clear, organized framework for learning how mint errors occur, how they are classified, and how they influence collector value.

Our Services

Helping collectors identify and understand U.S. coin mint errors with clarity.

Error Types

Detailed categories covering all common and rare U.S. coin mint errors.

Identification

Step-by-step guides to help you spot and verify coin errors confidently.

Expert tips on grading and understanding the significance of each error.

Reference

About Us

Helping collectors identify and understand U.S. coin mint errors with clarity and trust.

Your trusted guide to U.S. Mint Coins, Freaks & Errors