Canada 1982 Constitution dollar error mystery
This is my series and I know it quite intimately. I have some spectacular errors in this series, and I usually have no issue figuring out any errors I encounter (I am also a Canadian error collector). This one, however, has me stumped...
This little mystery came out of a paper-wrapped mint roll, and it has me scratching my head. This is not struck through bronze/copper fragments, this is not plated, and it does not come off with acetone or toluene... The reverse is spectacular, as portions of it shine like a newly struck bronze cent...
I have no idea what I am seeing here... almost looks like a copper wash (I assume the theory is that in the rinse bath, copper ions are preferentially liberated from previously washed 1c planchets, and then re-deposited on planchets of other coins when the solution becomes saturated).
Or, is this a sintered coin (Sintering is caused by the small dust-sized copper or other metal that are removed from the planchets or the drum they spin in, it then sticks to the planchet and then is annealed to soften the planchet before striking. The annealing step bakes the sintering on - I have seen this on Canadian 10c error coins).
Anyone here able to provide some insight, and why both sides have much different degrees of "copper" finish? I'd like to know what this is, and decide if I am going to add it to my PCGS showcase set of Canadian nickel dollar errors.
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