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This is what a small cut can do to a proof set.

ajaanajaan Posts: 17,950 ✭✭✭✭✭
edited July 9, 2026 8:45AM in U.S. Coin Forum

1959 Proof set. Small cut in the film in the dime slot. I assume the dime was right under the cut at one point.


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    privatecoinprivatecoin Posts: 3,806 ✭✭✭✭✭

    Lucky number 7. :D

    Sadly, it's unattractive black toning.

    Paper money eventually returns to its intrinsic value. Zero. Voltaire. Ebay coinbowlllc

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    MaywoodMaywood Posts: 4,148 ✭✭✭✭✭

    Point taken, but many of those old sets have holes/cracks and the coins remain unblemished. I think it really depends on storage as much as anything. I used to store the sets inside baggies.

    "Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety," --- Benjamin Franklin

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    coastaljerseyguycoastaljerseyguy Posts: 2,086 ✭✭✭✭✭

    So why do some proof mint sets turn a beautiful blue/red/yellow toning while some turn black? Why does adding air or maybe contaminants in the air cause the set toning to interact differently.

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    LJenkins11LJenkins11 Posts: 860 ✭✭✭✭✭

    Partial sideburns designation for sure.

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    Baylor8670Baylor8670 Posts: 272 ✭✭✭✭

    E-Z-Est to the rescue!

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    291fifth291fifth Posts: 25,191 ✭✭✭✭✭

    Ultra-rare "7" toning. Start the promotion! ;)

    All glory is fleeting.
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    coinbufcoinbuf Posts: 12,487 ✭✭✭✭✭

    Same thing happens with slabs.

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    PerryHallPerryHall Posts: 47,547 ✭✭✭✭✭

    Same thing with those 2"X2" cardboard fold and staple coin holders. Over a period of time, a small pinhole in the window frequently results in an unsightly black toning spot on the coin at that location.

    Worry is the interest you pay on a debt you may not owe.
    "Paper money eventually returns to its intrinsic value---zero."----Voltaire
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    MsMorrisineMsMorrisine Posts: 39,541 ✭✭✭✭✭

    @PerryHall said:
    Same thing with those 2"X2" cardboard fold and staple coin holders. Over a period of time, a small pinhole in the window frequently results in an unsightly black toning spot on the coin at that location.

    even on clad

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    MaywoodMaywood Posts: 4,148 ✭✭✭✭✭

    So why do some proof mint sets turn a beautiful blue/red/yellow toning while some turn black?

    That is due to a combination of rinse residue left on the coins and the composition of the packaging.

    "Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety," --- Benjamin Franklin

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    Franklin_FanFranklin_Fan Posts: 104 ✭✭✭

    I opened a bunch of 1963 sealed envelope proof sets, and some of them had the glue or whatever seals the individual coins compartments wear off and the coins were laying together in the cellophane. So the cool thing is the penny being copper toned the other coins beautifully. So I have franklins, quarters, dimes and nickels nicely toned. it was about 5 to 10 sets that were like that, and they all came from a batch of 25 that I bought from the same seller.

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