Error coin collecting is a growing hobby and family fun. Every year this guide is updated with new and exciting finds. No other guide presents as much information about error collecting. Photos of all errors with complete descriptions validated by PCGS and NGC terminology provide collectors with information to identify the type of error. A chapter is dedicated to presenting all known Lincoln cent DDO/DDR and RPM errors since 1909 with photos.

All types of errors from striking, planchet, and dies that collectors can locate from old collections, bankrolled coins, and circulation. Many error coins circulate without detection since most are not well known.

Some errors are difficult to determine, but some great tools are available to make error detecting easier, especially for RPM errors, some of which are easy to overlook. There are eight doubled die classifications for explaining the types of doubled dies created by die creation.

Major Error Categories
Die Errors
Die errors are created from broken dies, cracked collars, hub errors, misaligned dies, doubled dies, and repunched mintmarks.
Abrasions (scratches)
Bar
BIE
Broken hub
Broken punch
Collar break
Debris in hub
Die adjustment
Die breaks
Die crack
Die cud
Die cud retained
Die gouges
Die wear
Doubled die
Filled dies
Filled letters and numbers
Finned
Mintmark
Misaligned dies
Misplaced date
Missing details
Mule
Partial collar
Tilted collar
Mint Striking Errors
Mint striking errors result from the mint stamping process.
Bonded
Broadstrike
Brockage
Canceled
Chain
Collar clash
Counter brockage
Cupped
Double denomination
Double-struck
Extended rim
Flip over
Indent
Mated Pair
Multiple Struck
Off-center
Reverse Brockage
Rotated
Saddle
Strick over
Strikethrough
Uniface
Planchet Errors
The coin blank and the blanks with upsets on edge are called planchets. A type I planchet is the coin blank itself. A type II planchet is the coin blank with the edging rolling. Planchet errors include blanks used in the minting process with cracks, clips, defective lamination, occluded gas, unplated, wrong metal, and wrong planchet.
Blank
Clipped
Defective
Foreign
Fragmented
Improperly annealed
Lamination
Lamination retained
Occluded gas
Split
Thin/Thick
Tilted
Transitional
Unplated
Woodgrain
Wrong metal
Wrong planchet