1976 proof half DDO?

Discussion in 'Error Coins' started by mrweaseluv, Sep 24, 2012.

  1. mrweaseluv

    mrweaseluv Supporter! Supporter

    Ok was bored and looking through some recent purchases i added to collection. I happend to take a good look at my new 1976 silver 3 peice proof set. Looking at the half I see some very telling doubling so i look up the coin and sure enough there is a 76 DDO half and it is usualy DDR as well, on checking well i think i got one :D Opinions Please :D
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    I haveing a good week for DDOs first the 66 now this one :D
     
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  3. mrweaseluv

    mrweaseluv Supporter! Supporter

    Ok ok now i got 2 coins i seriously want to get slabbed guess i just gotta stop being a penny pinching miser and pony up the $129 for the gold PCGS membership (4 vouchers for grading included) since even through anacs would cost me almost that much to do 2 error coins. Damn i hate admiting i'm wrong, sorry guys :D
     
  4. atrox001

    atrox001 Senior Member

  5. BUncirculated

    BUncirculated Well-Known Member

    I wouldn't get ready to retire just yet.

    There is very slight, hardly noticeable, doubling that is not from a double die, but mechanical doubling.
     
  6. mrweaseluv

    mrweaseluv Supporter! Supporter

    working on lighting

    yes I'm pretty sure most of the doubling on the coin im seeing is MD. I am again attempting to get a 3rd light so maybe i can finaly get rid of the shadows on the coin a get you a real good pic. There is truly an art to getting good coin pics :D
     
  7. atrox001

    atrox001 Senior Member

    I have noticed that quite a few people on this site, actually most every one, use the abbreviation MD for Machine Doubling and Mechanical Doubling, like in this thread. I was brought up to use the abbreviation MD for Master Die, and MDD for Machine Damaged Doubling. I wonder which it should be MD, MDD, or maybe SD for Strike Doubling.

    Larry Nienaber
     
  8. BUncirculated

    BUncirculated Well-Known Member

    It should be MD for mechanical doubling as that is what it truly is.

    Considering what causes mechanical doubling, also called machine and strike doubling, is a mechanical issue during the striking of the coin. A loose collar or die, the coin shifting during striking, the die being jarred out of position from vibration of the press, or improper machine maintenance, is mechanical and causes MD.
     
  9. atrox001

    atrox001 Senior Member

    Thanks for the lesson...but what then would be an abbreviation for Master Die? The reason I brought this up is because I am not sure if he is thinking the doubling on his half dollar is Mechanical Doubling or Master Die Doubling, when he uses MD.

    Larry Nienaber
     
  10. BUncirculated

    BUncirculated Well-Known Member

    A Master Die is a metal punch used to produce the working hubs, which in turn are used to produce the working dies. So the MD usually refers to mechanical doubling.

    Master die doubling is entirely different.

    Here's a good reference on Master Die Doubling:

    http://doubleddie.com/203801.html
     
  11. atrox001

    atrox001 Senior Member

    You sure are a good source for information...but you didn't answer my question. What would be a good abbreviation for Master Die?

    Who says, besides you, that "MD usually refers to mechanical doubling"...your not speaking for the die variety collectors I know.

    Larry Nienaber
     
  12. BUncirculated

    BUncirculated Well-Known Member

    I've always known it to be referred to as Master Die, no abbreviation.

    Anyone who is discussing whether a coin has MD(mechanical doubling) or DD(double die)

    I wouldn't know any of the collectors you know as I'm in N.Y., and you're in Arizona.
     
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