1975-d Experimental or foreign Planchet?

Discussion in 'Error Coins' started by Glenn Attalla, Jun 14, 2020.

  1. Glenn Attalla

    Glenn Attalla Member

    Yeah the nickel has a slightly smaller indentation. EDFE58CC-6C0C-4D60-BD55-10312EC7CA67.jpeg 3E91C950-E86C-4CE0-A2B6-2D4B6C220258.jpeg FA20AD1A-EEA1-422F-98A4-294DEAFD92EE.jpeg 9258BA09-EFA7-4DED-94DA-C97A35852926.jpeg 664691E5-B5AF-4921-B81E-A9C2A91011AF.jpeg
     
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  3. Mike185

    Mike185 Well-Known Member

    Like all of us have said. The 75 d is plated or covered in mercury to make it look like that. The nickel is interesting..... “extremely lucky to pull a under weight nickel to put on a scale to prove the scale is right”. I would keep that and put it in a 2x2 with the weight. The 75 d put it it in a 2x2 also and lie to all of you buddy’s you have A 75 d cent on a foreign planchette to show off....
     
    Collecting Nut likes this.
  4. Collecting Nut

    Collecting Nut Borderline Hoarder

    That last line made me laugh.
     
    Mike185 likes this.
  5. rascal

    rascal Well-Known Member

    Didn't the OP just say the cent was not his coin ? lol
     
  6. Mike185

    Mike185 Well-Known Member

    ^^^^^^Read above. ^^^^^^
     
  7. TrailWalker

    TrailWalker New Member

  8. Michael K

    Michael K Well-Known Member

    No. And even if it were true test coins aren't put into circulation.
     
  9. TheFinn

    TheFinn Well-Known Member

    It took you longer to type that than to weigh three coins and take pics.
     
  10. rascal

    rascal Well-Known Member

    No go back and take time to read post # 59
     
  11. Conder101

    Conder101 Numismatist

    How did you determine it isn't a rolled thin planchet? Minimum weight for a cent blank is 2.98 grams which would have a theoretical thickness of 1.176 mm. A 2.88 gram blank will be 1.141 mm. A difference of .035mm (or just over 1/1000 of an inch) I doubt you could see that difference if you were looking at the edges of the blank. Once it is run through the upsetting mill forget it, and after striking even more so. As I have said many times you can't judge the thickness of a struck coin by looking at the edge. The edge thickness is more a function of the strength of the strike than the thickness of the blank.

    This can be demonstrated by looking at a proof coin. The proof and business strike are both the same material, same weight, same diameter, same starting thickness of the blank, the only difference being the striking pressure. But the proof coin, struck at the higher pressure will appear thicker when viewed at the edge. Likewise a well struck thin planchet can be thicker at the edge than a less well struck normal planchet.
     
    cpm9ball likes this.
  12. Glenn Attalla

    Glenn Attalla Member

    So should I do a gravity test?
     
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