NumisNook
The Journal
Understanding the Sheldon Coin Grading Scale
Where the 1-to-70 grading scale came from, how the letter-and-number abbreviations work, and what each broad grade band generally looks like on a coin.
How Mints Actually Strike a Coin: From Blank to Finished Piece
The journey from melted metal to a finished coin — rolling, blanking, upsetting, and striking — and how the process evolved from the hammer to the modern high-speed press.
Reading a Coin: Mint Marks, Dates, and Designers
What the small letters and initials on a coin actually mean — mint marks that identify where it was struck, and designer initials that credit the artist behind the design.
A Short History of the World's Currencies: From Barter to Banknote
From early bartering and the first Lydian coins to hammered medieval silver, steam-powered mints, and the eventual rise of paper money and decimal currency systems.
Building a Coin Collection That Tells a Story
Type sets, date-and-mintmark runs, topical collections, and collecting by era — different organizing approaches that turn a pile of coins into a coherent, documented collection.
Protecting Your Coins from PVC Damage and Humidity
Why soft vinyl flips cause the sticky green residue collectors call 'PVC damage,' how humidity accelerates toning and corrosion, and what archival-safe storage actually looks like.
Common Die Varieties and Errors Collectors Look For
Doubled dies, repunched mint marks, off-center strikes, and die cracks — the physical signatures each one leaves, and how error and variety collecting became its own corner of the hobby.