1971d Half Dollar Missing Clad Layer?

Discussion in 'Error Coins' started by amnight, Jun 29, 2013.

  1. amnight

    amnight Active Member

    Can anyone tell me if this coin is missing it's clad layer? It weighs about 11.30grams and looks to be thinner than normal. Thanks.
    coin copper 005.jpg coin copper 004.jpg coinpics2 003.jpg coinpics2 002.jpg Image3778.jpg
     
  2. Avatar

    Guest User Guest



    to hide this ad.
  3. Treashunt

    Treashunt The Other Frank

  4. gubni

    gubni Active Member

    Looks like its there to me.
     
  5. AWORDCREATED

    AWORDCREATED Hardly Noticeable

    Cu plated post mint?
     
  6. -jeffB

    -jeffB Greshams LEO Supporter

    Judging from the way the scrapes reveal a normally-colored layer, that would be my guess.
     
  7. amnight

    amnight Active Member

    For my education can someone tell me how the layers are actually layered? I know there is a copper core but what surrounds it from there in each stage? Also, if it is plated shouldn't it weigh more?
     
  8. desertgem

    desertgem Senior Errer Collecktor Supporter

    The inner core is pure copper, the clad layer is 25% nickel, 75% copper. The nominal weight is 11.34 grams with tolerance of +/- 0.454 grams.
     
  9. amnight

    amnight Active Member

    Thank you desertgem. I am having trouble understanding why this coin shows a little bit of nickel but mostly copper. Can you explain this to me? Sorry for my ignorance.
     
  10. Conder101

    Conder101 Numismatist

    You start with three ingots of metal, two of coppernickel and one of copper. Originally the ingots were bonded together explosively. They would literaly place explosives around the stack of ingots and set them off so the force of the explosion would bond them together. The ingots would then be rolled out into coining strip and planchets punched from it.

    Today one side of each of the coppernickel ingots and both sides of the copper ingot are ground very smooth and are cleaned and wire brushed to make sure the surfaces are completely clean and free from oxides. The ingots are stacked and then rolled under a very high pressure in order to bond the ingots together, and then the ingots are rolled into strip.


    By the way, not missing a clad layer. Weight is too high.
     
  11. amnight

    amnight Active Member

    Thank you Conder, I appreciate your detailed explanation!:smile
     
Draft saved Draft deleted

Share This Page