Collector & Reseller Glossary

What the jargon actually means — and what it does to resale value. 3,212 terms across 12 categories.

4 terms in Coins & Currency starting with “K” · page 1 of 1

1. key dateCoins & Currency
   A key date refers to a specific year of mintage for a particular coin that is significantly rarer or more desirable than other years of the same coin type. These dates often correspond to low mintage numbers, significant
2. key date varietyCoins & Currency
   This refers to a coin that features a specific date that is significantly different from the common or expected date for that particular coin type. These variations often occur due to minting errors, changes in productio
3. key varietyCoins & Currency
   A key variety refers to a specific, often rare, deviation or variation within a coin's design, minting process, or composition that distinguishes it from the standard issue. These differences can include minor die variat
4. key variety coinCoins & Currency
   This refers to a specific coin that possesses a unique or rare variation compared to the standard issue of that coin type. These variations can involve subtle differences in minting die, metal composition, lettering, or