No Date Lincoln Cent Mint Error - Incomplete Unstruck Planchet

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Author	Replies: 10 / Views: 927
tropicalbats Pillar of the Community United States 6116 Posts	Posted 11/05/2020 9:25 pm Haven't really seen one of these before, but shouldn't clipped unstruck planchets be fairly common? I searched around a bit but couldn't find any others so maybe not. Anyway, this appears to be a double clip (one really minor clip opposite the stronger one) of an unstruck planchet. No date Lincoln Cent mint error - double clipped unstruck planchet Report this Post to the Staff

MOS0239 Pillar of the Community 1110 Posts	Posted 11/05/2020 10:16 pm Is it a double clip or Blakesley Effect? Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 11/05/2020 10:20 pm Just an ignorant booger hanging around to learn something. Report this Post to the Staff
tropicalbats Pillar of the Community United States 6116 Posts	Posted 11/05/2020 10:26 pm It can't be the Blakesley Effect as that occurs during the strike. When a coin with an incomplete planchet is struck it can create a weakness on the rim opposite the missing bit, but this planchet wasn't struck so pretty much has to be a second very light clip. Report this Post to the Staff
Gincoin43 Pillar of the Community United States 1543 Posts	Posted 11/05/2020 10:37 pm Quote: When a coin with an incomplete planchet is struck it can create a weakness on the rim opposite the missing bit, but this planchet wasn't struck so pretty much has to be a second very light clip. What are the chances the upsetting mill did that because there was nothing to push on opposite? It looks like it might be slightly oblong. Edited by Gincoin43 11/05/2020 10:39 pm Report this Post to the Staff
tropicalbats Pillar of the Community United States 6116 Posts	Posted 11/05/2020 10:41 pm That would seem to be a possibility. Hadn't considered that and would make sense. Report this Post to the Staff
QuarterHoarder72 Pillar of the Community United States 2156 Posts	Posted 11/05/2020 10:59 pm Nice one! Don't see a lot of clips on blank planchets. Report this Post to the Staff
MOS0239 Pillar of the Community 1110 Posts	Posted 11/05/2020 11:11 pm Thanks for that explanation tropicalbats! ! Report this Post to the Staff
DBM Pillar of the Community Canada 9866 Posts	Posted 11/06/2020 12:50 am Quote: What are the chances the upsetting mill did that because there was nothing to push on opposite? About 100% That is exactly what happened. The Blakesley effect occurs before the strike. "Dipping" is not considered cleaning... -from PCGS website Report this Post to the Staff
Gincoin43 Pillar of the Community United States 1543 Posts	Posted 11/06/2020 01:25 am Quote: The Blakesley effect occurs before the strike I think that only describes what happens after strike, maybe you can get this one named after you Report this Post to the Staff
tropicalbats Pillar of the Community United States 6116 Posts	Posted 11/06/2020 01:25 am Interesting. I know you can get a weakness opposite the clip during the upset mill process, but always assumed the Blakesley effect was the expression of inefficient metal flow during the strike. Totally related, but since I've no experience with a clipped unstruck planchet I wouldn't have thought that a poorly formed proto rim across from the clip would also be called the Blakesley effect. Report this Post to the Staff
	Replies: 10 / Views: 927

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