What is wrong with the mintmark on this 1969 S Proof Jefferson?

Comments

• Kkathyl Posts: 3,762 ✭✭✭✭✭

  January 31, 2018 8:01PM

  Can we see the whole coin it is hard to tell if that is reflection doubling or just stretch/ flow of sort. .

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• MICHAELDIXON Posts: 6,596 ✭✭✭✭✭

  January 31, 2018 8:14PM edited January 31, 2018 8:14PM

  
  Probably shelf doubling since the 6 and 9 have it also. Of the 10 I have, it is the only one.

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• JRocco Posts: 14,277 ✭✭✭✭✭

  January 31, 2018 8:15PM

  This is an effect called Flat Field Doubling.
  I can post some other examples if you would like to see them.

  Here is a quote from I believe it was Matt Diamond explaining the effect:
  Quote:
  Flat field doubling : This coin exhibits dual images as a result of having its machine doubled image flattened by the second strike of a proof coin. This is a very common phenomenon on proof coins from 1950-1974.

  Second strike doubling from a loose die : This is the first of two exceptions to the rule which says that doubling must show on both sides of the coin. This coin exhibits doubling on the anvil die side of the coin only due to the die being loose and turning between strikes. This type of double strike usually only affects proof coins which are normally struck twice.

  Some coins are just plain "Interesting"

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• BuffaloIronTail Posts: 7,549 ✭✭✭✭✭

  January 31, 2018 11:43PM

  @JRocco said:
  This is an effect called Flat Field Doubling.
  I can post some other examples if you would like to see them.

  Here is a quote from I believe it was Matt Diamond explaining the effect:
  Quote:
  Flat field doubling : This coin exhibits dual images as a result of having its machine doubled image flattened by the second strike of a proof coin. This is a very common phenomenon on proof coins from 1950-1974.

  Second strike doubling from a loose die : This is the first of two exceptions to the rule which says that doubling must show on both sides of the coin. This coin exhibits doubling on the anvil die side of the coin only due to the die being loose and turning between strikes. This type of double strike usually only affects proof coins which are normally struck twice.

  A very nice write up, JR.

  Pete

  "I tell them there's no problems.....only solutions" - John Lennon

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• JRocco Posts: 14,277 ✭✭✭✭✭

  February 1, 2018 9:23AM edited February 1, 2018 9:24AM

  Let me correct - Mike Diamond not Matt Diamond I was tired last night.
  Thanks Pete.

  Some coins are just plain "Interesting"

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