9465Re: [Error Coin Information Exchange] Re: Unusual upset on a nickel planchet
- Sep 7, 2005Looking at the pic it looked to me like the blank had be struck by
blank "dies". Could a working die that was never impressed from a hub
make it into the press? I guess it would have to be a blank pair of
dies though. Maybe the to-be-hubbed dies got mixed in and you're not
looking at a planchet at all but a blank "coin"?
--- Mike Diamond <mdia1@...> wrote:
> One thing I'd like to understand about planchets such as the one you______________________________________________________
> pulled out is exactly how such a wide, high proto-rim is produced.
> would seem that more than simple squeezing and rolling is involved.
> looks almost as if the two faces are clamped between two flat
> as a slightly wider perimeter is squeezed and rolled. Otherwise,
> one explain the abrupt junction between inner border of the proto-rim
> and the flat surface?
> Does anyone out there have a clue?
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