can a mintmark be a DD?

Discussion in 'Coin Chat' started by bryantallard, Aug 12, 2010.

  1. bryantallard

    bryantallard show me the money....so i can look through it

    can a mintmark be a DD? the first and third nine on the bottom look like it might be, but i am curious about the mintmark itself. DSCF0602.jpg
     
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  3. Hunt1

    Hunt1 Active Member

    it can be what ever you want it to be
     
  4. desertgem

    desertgem Senior Errer Collecktor Supporter

    Hi Bryantallard! Welcome to the forum!

    Since the die for this nickel was produced under the single squeeze method, rather than the old multiple hubbing process, it is extremely unlikely that there would be true doubling that far from the center of the coin, where most might occur, such as with the doubled fingers in the 2009 Lincoln cent series. Also the doubling of the mint mark appears to be machine doubling which is not a variety. I must admit I can not see the date well enough, but I feel it is also.

    Jim
     
  5. coinmaster1

    coinmaster1 Active Member

    looks fine to me.
     
  6. Shoewrecky

    Shoewrecky Coin Hoarder

    99.9% of the time its MD...that year ifI recall correctly produced some poor quality nickels..as a matter of fact I have seen and have MANY of them that look like DD but are really Md.
     
  7. medoraman

    medoraman Supporter! Supporter

    I believe that mint marks are crafted into the dies, so it cannot be repunched mm like the old days. I also doubt a dd because of what desertgem stated their change in processing dies. So that leave the most likely explanation of machine doubling. This is by far the most common doubling nowadays.

    Question for the group. Why is machine doubling worthless? Because its too common? I know the official explanation is because it is not an error in the die, but it still is an official US mint error, right?
     
  8. ikandiggit

    ikandiggit Currency Error Collector

    "Question for the group. Why is machine doubling worthless? Because its too common? I know the official explanation is because it is not an error in the die, but it still is an official US mint error, right"

    I understand it to be "not an error" because it is the result of normal progressive deterioration (wear and tear) on the die itself. The same with coins that have the effects of die deterioration. While interesting to look at, they, too are not errors.

    Cuds, retained cuds etc. are considered errors because they are the product of a die that was damaged that should have been taken out of service.
     
  9. GDJMSP

    GDJMSP Numismatist Moderator

    No, it isn't. Mechanical doubling can occur with brand new dies. It occurs because of movement at the last instant of the strike when the dies are lifting away from the coin. Some even say that it can occur when the coin bounces up and hits the hammer die before it can completely pull away.

    If anything, mechanical doubling should be considered to be a form of damage because that is what is happening. Whether it is from the die shifting slightly as it begins to pull away, or because the coin bounces up and hits the die - what is happening is that the die is scraping part of the design, letters or numbers to one side or the other. That is why what you see is a flat shelf like appearance. It's because the die is in effect cutting the raised portion on a horizontal plane and scraping the upper portion to the side slightly thus leaving sharp, flat edges.

    In a true double die you will find rounded edges and split serifs.
     
  10. Conder101

    Conder101 Numismatist

    A mint mark CAN show the effects of a doubled die but only in the time period from about 1990 to 1995. Before 1990 most mintmarks were punched into the die by hand after it was finished (and any doubling from the hubbing process was finished) and after about 1995 the mint switched over to the single squeeze hubbing method which pretty much eliminated all doubled dies except for slight doubling in the very center area of the die. (On many world coins mintmarks can show doubled dies because the mintmark is part of the die and they were still using the multiple squeeze hubbing techniques.)

    I do not know if there are any US doubled die mintmarks known.
     
  11. kangayou

    kangayou Junior Member

    Correct me if I am wrong, It is possible to have true Doubling and machine doubling or tripling on the same coin.
    Regarding the OP's initial question that has already been answered.
    Forgot to welcome you. Also when mint marks were punched by hand and they were punched more than once those are usually referred to as an RPM or repunched mint mark.
     
  12. ikandiggit

    ikandiggit Currency Error Collector

    Yes. Machine doubling can occur at any time on any coin.

    Yes, to the RPM explanation.
     
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