2017 d rpm one cent error

Discussion in 'Error Coins' started by User12345666, Nov 13, 2020.

  1. User12345666

    User12345666 Active Member

    16052430348481613595302597402556.jpg 16052431211137493661847119577272.jpg Thu Nov 12 23-03-24.jpg Thu Nov 12 23-02-36.jpg Thu Nov 12 23-19-09.jpg Found a nicer 2017 d one cent rpm. What do you think the vaule is ?
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  3. Pickin and Grinin

    Pickin and Grinin Well-Known Member

    That's a stain.
    The last possible RPM was in 1989. It was then that hand punching the MM was ended and therefore it is impossible to have a RPM on anything dated 1990 and newer.
    Value 1 cent.
  4. Mark1971

    Mark1971 Active Member

  5. SensibleSal66

    SensibleSal66 Casual Collector / error expert "in Training "

    1 Cent .
    I was gonna say Flat field doubling at best , but yes it does look like a stain in the shape of a D .
  6. User12345666

    User12345666 Active Member

    Thu Nov 12 23-41-55.jpg Thats the best picture I can get. a stain.. ok thank you for your time.
  7. User12345666

    User12345666 Active Member

    Its a raised surface, i think its just a fragment with stains on it.
  8. SensibleSal66

    SensibleSal66 Casual Collector / error expert "in Training "

    Ok . Flat Field Doubling . NO added value . Thanks
  9. SensibleSal66

    SensibleSal66 Casual Collector / error expert "in Training "

  10. furryfrog02

    furryfrog02 Well-Known Member

    RPMs are not possible after 1989.
    SensibleSal66 likes this.
  11. Oldhoopster

    Oldhoopster Member of the ANA since 1982

    The mark below the mm is probably a small plating blister if it’s raised. While it vaguely resembles a D, it’s not the same size or shape as the mm. That’s the obvious giveaway that it can’t be a RPM (besides the fact that mintmarks weren’t added by hand in 2017)

    If you’re referring to area to the right of the mm. it looks like some very minor die deterioration doubling and is very common on copper plated zinc cents.
    Mountain Man and furryfrog02 like this.
  12. SensibleSal66

    SensibleSal66 Casual Collector / error expert "in Training "

    Thanks @Oldhoopster . I had " brain fog " on this one . lol
  13. Clawcoins

    Clawcoins Well-Known Member

    Definitely a Stain plus plating blisters.
    Just in case you didn't recognize all the other plating blisters I circled them in yellow.
    If you didn't notice the stain went up and on the lower part of the D too shown in Blue.
    And the D has split plating / die deterioration issue in Green, you can see the metal stretching on it's right and lower right, and the inside of the D.
    The cent has lots of problems.

    Attached Files:

  14. SensibleSal66

    SensibleSal66 Casual Collector / error expert "in Training "

    Can you educate me. How do these blisters occur . Is it in the making of the planchets ? Are these rolled out today or do they receive the Blanks already cut ?
  15. Clawcoins

    Clawcoins Well-Known Member

    planchets are bought from an external supplier
    they are very thin copper, I think 7 micron thin, copper plated zinc cores.

    Zinc reacts when plated with copper to such things as .. ooh steam (like if it goes through the laundry); left on the ground .. you know... standard use stuff. The coins are designed to be easily and low cost manufacturer, period for visual identification as one cent by cashiers, et all. They are not designed for "collectors" especially the ones designed and manufactured for circulation.

    Any time there is a breach in the copper surface you will start getting corrosion.
    minor PMD can cause a breach. Split plating from die deterioration can cause a breach. scratches or other surface damage can cause a breach.
    This corrosion can spread internally and start bubbling, linear plating blisters and a whole bunch of issues.

    Just know that a copper plate zinc planchet has corrosion domes, plating blisters (which include long linear ones). So many problems ....

    I was going to PM you something but your PM is turned off.
    Evan Saltis likes this.
  16. Pickin and Grinin

    Pickin and Grinin Well-Known Member

    For anyone that needs it this is the go to for all errors.
    Just type in what you are looking for.
    enamel7, JeffC and PassthePuck like this.
  17. BJBII

    BJBII Metrologist, CSSBB

    Is this right?
    Seems pretty thin to me. 7 microns is about 28 ten thousandths of a inch. You would need 218 of those 7 micron thick planchets to stack up to the thickness of a U.S. penny.
  18. Danomite

    Danomite What do you say uh-huh Supporter

    He is describing the thickness of the copper plating over the zinc core.
  19. Clawcoins

    Clawcoins Well-Known Member

    I've read 7 and 8 micron thin copper plating; plating which is over a zinc slug which is our current Cent mid 1982 to current.

    ie, you start out with a zinc slug.
    Then you copper plate it with 8 microns of copper plating.
    There is no layering.

    With mid 1982 and earlier it was a copper planchet.

    I've also read stuff about 20 to 25 micron but I think those are related to strictly the Royal Canadian Mint's version of the modern cent.

    Danomite likes this.
  20. Collecting Nut

    Collecting Nut Borderline Hoarder

    Your coin is filled with stains. This one just looks like a mintmark but it's a stain.
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