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Those rods become the dies which strike planchets making them into coins. Hub and die errors can occur at the time the dies are made, when the dies are installed into presses, and from die deterioration during use. Modern coins can still be released with hub and die errors when the defects are too small to be seen with the naked eye.
Collectors and organizations dedicated to collecting coins regard mint striking errors as those that have been created by the minting process. Mint striking errors are caused by the collar moving, cracking, or not being present in the minting process. The collar is a third die that actually holds the coin in place in the minting process.
Print/export Download as PDF; Printable version; In other projects ... Pages in category "Mint-made errors" The following 12 pages are in this category, out of 12 ...
The following mint marks indicate which mint the coin was made at (parentheses indicate a lack of a mint mark): P = Philadelphia Mint. D = Denver Mint. S = San Francisco Mint. W = West Point Mint. O = New Orleans Mint. CC = Carson City Mint
The field of a die is the highest point, so when a mint technician polishes the die or the metal flow of a coin wears it away, the field is the first thing to be worn down. The difference here is that Outside doubling does not overlap any of the original design, but rather appears like an irregular shelf around the object.
Print/export Download as PDF; ... The following mint marks indicate which mint the coin was made at: P = Philadelphia Mint. ... Extra leaf errors are known. [3] [4] S ...
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Brockages are relatively rare among modern coins of industrialised countries where mints exercise a strict production control and somewhat less rare among the modern coins of some developing countries which operate their own mint (e.g. Nepal); in good condition, coins with clear brockage are a collector's item and can sell for substantial ...