Working draft — edit on staging at Admin → Content → Pages (v3.coppercoins.com/admin/static-pages). Add real coin photos and tighten definitions before launch.
Design variety
A design variety describes a recognizable difference in the master layout for a given year and mint — how the date, motto, or devices were hubbed for that issue. Examples on Lincoln cents include large date versus small date, or other obverse/reverse layout differences that affect every die from that hub pairing until the design changes.
Design variety answers: Which version of the year’s design does this coin belong to? It is not the same as hub-doubling class (Class I, II, etc.) and not the same as an individual doubled-die marriage.
On CopperCoins, design varieties have their own hub pages under Design Varieties. A die page may link to a design variety when that die was attributed within a defined large-date / small-date (or similar) group.
Die variety
A die variety is a specific die marriage in the CopperCoins catalog — one identifiable obverse and/or reverse die documented with a unique die number, stage photos, markers, values, and cross references.
Collectors study die varieties for doubling, repunching, over mint marks, and other die-specific characteristics. Two coins can share the same design variety but belong to different die varieties if they were struck from different dies.
See CopperCoins die number format for how die numbers are structured.
Error
In catalog usage, an error is a coin or die phenomenon outside normal hubbed design and routine die-variety attribution — for example certain striking anomalies, planchet defects, or off-metal pieces when they are cataloged that way.
Many items collectors call “errors” in conversation are actually die varieties (RPMs, doubled dies, etc.) and belong in the die catalog instead. This page uses error the way CopperCoins staff apply it when a listing is not a standard hub-doubling or repunching variety.
How the three terms work together
- Start with design variety when the year has more than one master layout (large vs. small date, for example).
- Within that context, identify the die variety using markers, doubling, or mint-mark placement documented on the die page.
- Use error only when the phenomenon is outside that die-variety framework.
Related help
TODO: add side-by-side photos (large date vs. small date; die variety vs. strike doubling); link one example die for each term.
