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Experimental Rinse Dollars - What was the verdict?

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  • ZoinsZoins Posts: 34,186 ✭✭✭✭✭
    edited April 2, 2022 4:47PM

    Here's another page from Mike's website showing the SEGS slab.

    The CoinWorld article indicates that Mike had these slabbed by Larry Briggs of SEGS.

    I wonder how many of these are still in their original SEGS holders? Anyone see one recently?

    https://mikebyers.com/exprinse.html

  • I thought the 2000 P looked like a good candidate for the rinse. What do you guys think? I don't have them in hand yet but I can post better photos when I do.

  • BustHalfBrianBustHalfBrian Posts: 4,165 ✭✭✭✭

    @GBowyer said:

    I thought the 2000 P looked like a good candidate for the rinse. What do you guys think? I don't have them in hand yet but I can post better photos when I do.

    I think the lighting used for the photo is making that coin appear to be a different color than it really is. My guess is that it will look the same as the other ordinary Sac dollars once you see it in hand.

    Welcome aboard.

    Lurking and learning since 2010. Full-time professional numismatist based in SoCal.
  • "I think the lighting used for the photo is making that coin appear to be a different color than it really is. My guess is that it will look the same as the other ordinary Sac dollars once you see it in hand.
    Welcome aboard."

    Thanks, It wouldn't be the first time I've been fooled by photos, so we'll see.

  • I actually just came across this in from change from a bank and i am hoping I have something here, Thanks in advance

    Brian

  • DCWDCW Posts: 7,341 ✭✭✭✭✭

    I think your odds are astronomically low. Looks like dark toning, nothing more

    Dead Cat Waltz Exonumia
    "Coin collecting for outcasts..."

  • i def dont think its toning as it does not come off, its a dark brown, here is a straight on view

  • 1madman1madman Posts: 1,475 ✭✭✭✭✭

    Your coin’s surface should have a sheen/reflectiveness to it if it has the experimental rinse. Think of it as that dark area having full cartwheel luster.

    It’s somewhat tough to judge from your photos, but appears to be a dull muted look to the surfaces, making it more likely a tone or circulation effect that caused the darkness, not experimental rinse. It’s even possible your coin has been improperly annealed, which causes the darker color but gives the “dry” look to the surface.

  • thanks for the input and help, those pics i did with a scanner, i tried to get better ones with the phone, not sure if it changes anything for the better, lol


  • Mr_SpudMr_Spud Posts: 5,373 ✭✭✭✭✭
    edited August 17, 2024 9:53AM

    I think this article contains info on the chemicals used by the mint on these experimental rinse coins
    https://www.researchgate.net/publication/263222095_Nanotribology_Application_in_the_Coining_Industry_I-Turn_off_Stamping_Oil_Sprayer_during_Coining

    It involves this and similar versions of Carboshield
    https://www.atamanchemicals.com/upload/katalog/38.pdf

    Carboshield BTX was the form of Carboshield they used at the mint.

    Mr_Spud

  • FredWeinbergFredWeinberg Posts: 5,828 ✭✭✭✭✭

    Those most recent photos above are not of an experimental rinse dollar in my opinion.

    environmental damage of some type, but not a mint product from what I see in the photos

    Retired Collector & Dealer in Major Mint Error Coins & Currency since the 1960's.Co-Author of Whitman's "100 Greatest U.S. Mint Error Coins", and the Error Coin Encyclopedia, Vols., III & IV. Retired Authenticator for Major Mint Errors
    for PCGS. A 49+-Year PNG Member...A full numismatist since 1972, retired in 2022

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