Counterfeit Coins
- All strikes from counterfeit dies
- First strike authentic; later strikes counterfeit
- Counterfeit strike on authentic planchet
- Counterfeit strike on counterfeit planchet
Fabricated or Altered Errors
- Squeeze jobs (a.k.a. vise jobs, hammer jobs, smash jobs, garage jobs)
- Dryer coins
- Coins that are rolled and squeezed in the horizontal plane
- Spooned coins
- Acid-dipped coins
- Coins plated outside the Mint
- Coins with original plating chemically stripped
- Pinpoint alterations (date, mintmark)
- Solder
- Glue
- Holed coins
- Snipped-off and crimped edges
- Heat damage (blisters, discoloration)
- Rippled Coins
- Texas Coins
Enhanced Errors (genuine errors that are subsequently modified)
Damaged Coins
- Chemical corrosion
- Environmental discoloration and corrosion
- Crushed
- Bent
- Impact damage
- Stacked coins crushed and fused in equipment
Green lettering – major heading
Blue lettering – link to subject matter
Brown lettering – subject matter covered under that heading
Black lettering – no entry yet