A colleague brought this in today. I don’t think I’ve seen an error like this but I don’t collect or study modern coinage. Any help appreciated.
Well I managed to discover that it is a clipped planchet error. Funny this circulated for so long without someone noticing.
I'm no expert by any means, and really want to be corrected if wrong so I can learn, but I think its a clipped planchet. If you look at the coin opposite the clip you can see a weaker strike. Pretty sure that's the Blakesley effect, caused by the die and the missing part of the coin. Edit: OK, we posted at the same time... lol Still want to know if I read it right for the right reasons...
Someone will probably beat me to the punch )), but this is often referred to as a "clipped coin" or "clipped planchet" where, as the planchet (or blank) is punched from the metal strip, the punch overlaps where another planchet was punched.
The correct name for that is an Incomplete Planchet. They call it a Clipped Planchet because it looks like it was clipped. But the reality is that it never was. It is incomplete because the planchet was cut out from the sheet of stock metal a bit to close to the previous planchet.
The correct term for this is an Incomplete Planchet. There are many types but yours is the curved clip. Here’s a few of mine: This is a piece of the flat sheet that is left after the planchet is punched out. This diagram shows how these types of errors are produced. They occur when the metal strip is not rolled out correctly. In the diagram above, notice on the far right about half way from the top the Triple Clip. Here’s an example: