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Message:: [QUOTE="SuperDave, post: 2674931, member: 1892"]I remain unconvinced - as I mentioned in the other thread - that it was possible to strike this coin in one go. Obverse and reverse dies are not the same size. The anvil die has to be smaller, for the collar to slide around it. The hammer die has to be heavier, to withstand the strain of striking. There's a cancelled set, with the collar, offered on Ebay right now. Here's one of the pics: [ATTACH=full]596427[/ATTACH] It's purportedly 1968-S; I know they were melting dies and offering them for sale from this period. See the obvious difference between the dies? The tapered-shoulder ones are the hammer dies. You don't think they used a setscrew to hold a die in place under 100 tons of pressure, striking 100+ coins a minute, do you? <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /> How you gonna put one of them in the place where the anvil die fits? The question of whether "clandestine" errors are worthy of "authentication" is for another thread. Just understand, there's no other explanation for this coin. It would have taken two strokes of the press, with something other than a die in the anvil position (assuming the obverse was the hammer) to create this Nickel.[/QUOTE]