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<p>[QUOTE=&quot;rmpsrpms, post: 3000087, member: 31773&quot;]I suppose only way to prove it is to do a double-blind test. If you&#039;re willing we could find a 3rd party to take a group of coins (preferably Bronze Cents but Silver coins are OK as well) that are known to be original (perhaps from OBW rolls) and dip some of them and send them to me. You send the list of coins to a 3rd party we both trust. I inspect the coins and send my analysis to the 3rd party, who publishes the score.</p><p><br /></p><p>edited to add: silly me, I made an error in the experimental design. We&#039;d need the 3rd party to do the dipping and record which coins were dipped and which are still original.[/QUOTE]</p><p><br /></p>

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