Planchet
Clipped planchet
The blanking press overlapped a previously punched area, so the blank came out with a curved or straight bite missing.
How to spot it
A smooth curved or straight missing arc, plus the tell-tale weakness in the rim opposite the clip (the Blakesley effect).
Value impact
Small to moderate premium depending on size and denomination.
Known examples
- Curved clip cents
- Straight clip nickels
Check your coin for this error
The identifier looks for clipped planchet on every scan and flags it on your result with an estimated value range.