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Split planchet errors are normally restricted to planchets composed of a solid alloy, such as U.S. cents and nickels, [7] and the Australian fifty-cent coin. [6] Split planchet errors should not be confused with "separation errors", which only affect clad and plated coins.
The over mint mark is created when a one date and mint mark is punched over another date, part of a date, or mint mark. These coins are generally restricted to the early minting process of coins dating before the turn of the century. The DDO and DDR errors are related to any part of the coin that shows a distinct doubling.
You don’t usually see errors with proof coins, but there are exceptions. One involved 1975 dime proof sets, which that lacked an “S” mintmark (from the San Francisco Mint).
The Canadian impression of the 20-cent coin is known as the "Ottawa Mint" version, which may be misleading as, post 1976, the Ottawa Mint only produced precious metal commemorative coins, like the Perth Mint, meaning the coins may have been produced at the Royal Canadian Mint's [2] Winnipeg facilities.
The first silver-clad half dollars were struck at the Denver Mint on December 30, 1965, bearing the date 1965; the date would not be changed for all US coinage until the coin shortage was eased. [20] Beginning on August 1, 1966, the Mint began to strike 1966-dated pieces, and thereafter it resumed the normal practice of striking the current ...
The following mint marks indicate which mint the coin was ... until 1966 D 704,135,528 Continued to be struck until 1966 (P) 3,950,762 Proof (S) ≈20-50 [10] Satin ...
The Kennedy half dollar is a United States coin that has been minted since 1964. In the first year of production the coins were minted in 90% silver and 10% copper (90% silver). From 1965 through 1970, the coins were minted in a clad composition of mostly silver outer layers and a mostly copper inner layer (40% silver).
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 ...