1922 Jon Sullivan ANACS Peace Dollar Lamination Error

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Author	Replies: 6 / Views: 3,256
colonialjohn Pillar of the Community United States 1757 Posts	Posted 04/28/2014 2:10 pm See here: http://www.ebay.com/itm/25149437928....m1497.l2649 Here are the results. The coin in order to do a SEM/EDS had to be broken out of the ANACS holder as you can not analyze through plastic as it creates erroneous results. Very unusual: The unlaminated silver surface yielded: Ag: 92.26% with Cu <1%. Within the LAMINATION bands: Ag:58.73%, Sn:34.14%, Pb:5.32%, Copper: 1.48% WOW!? So we have two possiblilities: 1. A contemporary counterfeit but silver plated with regal dies? Unlikely? Lamination bands genuine due to high irregular edges - NO DOUBT. 2. An extreme case of tin and lead CONTAMINATION getting into the alloy mix creating an unstable alloy and hence creating these large lamination bands. So Fred, Mike, Jon and others ... as with anybody else I could see $$$ asnd suggest an incredible improper alloy mix error certified by ANACS with this confirmed UNDERLAYER alloy or a contemporary counterfeit. I have never seen a silver plated (Ag/Sn/Pb alloy underlayer) mix Federal Silver Coin before ... just silver plate lead if you want to counterfeit this issue ... why silver plate a 50% Ag host ... Sometimes Material Analysis rarely keeps us guessing in a CIRCLE ... it seems so in this case? Coin World Mike? Clearinghouse ... let me know will send certified with SEM/EDS of BOTH areas? John Lorenzo United States The above was posted in the Yahoo-Error Chat Room. Posting here also for CCF: Has anyone in CCF-Errors heard os a U.S. Federal coin alloy mixed with solder creating a lamination error or just a piece suggesting this form of contamination in the alloy? Edited by colonialjohn 04/28/2014 2:13 pm Report this Post to the Staff

coop Bedrock of the Community United States 62064 Posts	Posted 04/28/2014 2:28 pm To me this coin looks like it was painted with a chemical that removed part of the surface and turned it a darker color? That is what I see. Report this Post to the Staff
colonialjohn Pillar of the Community United States 1757 Posts	Posted 04/28/2014 2:49 pm Silver melts at 1763F. Tin at 450F and Lead at 621*F. How do you account for the highly irregular borders of the lamination streaks? with no trace of a post mint chemical? near or atop these borders. Its impossible - for this to be a application event - improper alloy mix due to solder contamination. Coin in hand - is needed - your at a disadvantage. What chemical in your opinion did this ? <BG>. Report this Post to the Staff
colonialjohn Pillar of the Community United States 1757 Posts	Posted 04/28/2014 3:04 pm ANACS = Jon Sullivan = John Lorenzo - FAKE? Any solder contamination improper mix alloys in your CCF database - just curious? JPL Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 04/28/2014 3:20 pm Not sure what chemical, but you mentioned copper in your post. I was wondering if it was a flux that they used on copper? I just noticed how it looked like brush like strokes that is on your coin? I was wondering about the depth of the darker areas. In some areas it looks like surface and other areas it looks recessed into the coin. ANACS did say it wasn't silver, so I doubt it is counterfeit. I just question they why as to the lines. Seems like something as add/tampered with your coin. Nothing in the striking process would cause this, but planchet tampering is what I wonder about? Report this Post to the Staff
colonialjohn Pillar of the Community United States 1757 Posts	Posted 04/28/2014 4:16 pm Mike Diamond is perplexed also so he is sending me a Lincoln Cent with similar effects. I was doing a Jefferson nickel Study with Mike that got interupted. The current thinking laminations are caused by physical effects and contamination but we really NEVER SEE any good examples of contamination or improper alloy mixing via Material Analysis. I am planning to study the WWII 5C pieces and maybe study manganese being the culprit causing the real high surface failure on these issues. If a large amount of solder did make its way to a strip prior to annealing/ blanking this may cause this effect - do you consider the WWII 5C alloys stable? The lamination streaks here are perfectly UNIFORM in their sub-surface depth. Mike may do a CW Clearinghouse on this piece ... JPL Report this Post to the Staff
colonialjohn Pillar of the Community United States 1757 Posts	Posted 05/21/2014 11:09 am Will be verified? by another Material Analysis testing laboratory for a future Coin World article - will keep the group informed. The bands on the actual coin are MUCH lighter - BTW. John Lorenzo United States Edited by colonialjohn 05/21/2014 4:02 pm Report this Post to the Staff
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