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Pan Pac Half Dollar Toning Cause

ZoinsZoins Posts: 34,119 ✭✭✭✭✭
edited April 14, 2017 4:17PM in U.S. Coin Forum

Many Pan Pac half dollars have a similar circular / ring toning pattern on the faces around the edges, a circle on the obverse and reverse that goes through the letters. On some, the circular toning is bluish on the obverse. I was wondering what caused this look? Was it the original holders?

Comments

  • kazkaz Posts: 9,171 ✭✭✭✭✭
    I think theywere sold in velvet lined boxes that imparted pale blue and pink tones. On mine, the colors are spread across the surfaces and not in a ring pattern.

    image

    image



    Perhaps the ring toned ones were removed from the boxes before the toning had progressed too far and later placed in an album? Just speculating.
  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭

    It's not toning and I've always felt it was die or striking related as you see the inner peripheral line even on AU examples which have been dipped multiple times.

    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • Originally posted by: Broadstruck





    It's not toning and I've always felt it was die or striking related as you see the inner peripheral line even on AU examples which have been dipped multiple times.





    This si something I have also noticed and thought myself. You can overdip these and still see those "devices".
  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭
    These might need to be dipped in Wisk laundry detergent which has been known for decades to remove Ring Around the Collar image
    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • EagleguyEagleguy Posts: 2,264 ✭✭✭✭✭
    A photo might be helpful here for the non-commemorative collectors



    image



    JH
  • keetskeets Posts: 25,351 ✭✭✭✭✭

    it's probably an anomoly somehow related to the annealing process which resulted in metal fatigue/softness in that particular area of the die(s). it would be interesting to know if this is unique to one die or to all the dies used to strike the coins.

    I recall other threads discussing this topic, maybe do a search to see what others have had to say.

  • BroadstruckBroadstruck Posts: 30,497 ✭✭✭✭✭
    image
    To Err Is Human.... To Collect Err's Is Just Too Much Darn Tootin Fun!
  • rickoricko Posts: 98,724 ✭✭✭✭✭
    These might need to be dipped in Wisk laundry detergent which has been known for decades to remove Ring Around the Collar

    Good one Broadstruck..... Cheers, RickO
  • ashelandasheland Posts: 23,189 ✭✭✭✭✭
  • ianrussellianrussell Posts: 2,489 ✭✭✭✭✭
    We handled this coin recently, also with the circular toning (and additional toning).

    - Ian

    (I guess I can't add images - what is the work around for displaying images?)
    Ian Russell
    Owner/Founder GreatCollections
    GreatCollections Coin Auctions - Certified Coin Auctions Every Week - Rare Coins & Coin Values
  • EagleguyEagleguy Posts: 2,264 ✭✭✭✭✭
    From Commemorative Coins of the United States: A Complete Encyclopedia by Q. David Bowers: “On many pieces there is an inner ‘circle’ or ‘line’ near the rim of the obverse due to die characteristics.” (pg. 128)



    To also answer the original question by the OP, “the coins were sold singly in paper envelopes or as part of a group in velvet-lined black leatherette cases.” (ibid pg. 126)



    JH

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