Not sure if it's a chemical, or if it's been 'ringed' in something.
But not of mint origin, that's for sure.....
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 50+ Year PNG Member.A full-time numismatist since 1972, retired in 2022.
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No Way Out: Stimulus and Money Printing Are the Only Path Left
President, Racine Numismatic Society 2013-2014; Variety Resource Dimes; See 6/8/12 CDN for my article on Winged Liberty Dimes; Ebay
Not sure if it's a chemical, or if it's
been 'ringed' in something.
But not of mint origin, that's for sure.....