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Old June 24th 06, 01:38 PM posted to rec.collecting.books
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Default Mis-bound book values

michael adams wrote:

Presumably coins are manufactured in batches as well.


A visit to a US Mint (and presumably any other mint) would reveal that
coins are made in a continuous process.
Coin blanks are constantly fed into a hopper, the blank stamped by dies
and the finished coin is ejected.
The process continues until quitting time or if there is a problem with
the machine.
Increased quality control has made error coins harder to find than in
the past but they still exist and probably always will, this being an
imperfect world.
Common errors include off-center strikes, double strikes, clipped coin
blanks.
Less common are serious problems with the dies (such as the famous
doubled die Lincoln cents) although coins showing minor die cracks are
very common.

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