Sometimes a coin receives certain errors during minting. These error coins are again sent for remanufacturing. However out of so many coins some error coins are missed out and are unintentionally released to the public. These error coins are in great demand by the collectors and are usually sold at a premium. Its value depends upon rarity of that kind of error. Value of an error coin increases if the error on it is rarely found on the coins of same denominations.
Different type of errors found on coins are:
1. Mules : When a coin has obverse (head) die of one coin and reverse (tail) die of another.
2. Blank planchet : When both the sides (observe & reverse) of a coin is plain.
3. One side blank : When any one side of a coin is plain.
4. Discoloration : This happens when accidentally different metals are used.
5. Die rotation error : When the images on both sides of a coin are at different angle with each other.
6. Die crack error : This happens when the die breaks during minting or if a broken die is used during minting.
7. Ghosting error : When the impression on one side of coin is seen on another side also.
8. Broken edge error : When a part of the edge of a coin is broken.
9. Edge error : When the edge of a coin is found to be different than what is found on same type of coin with same date.
10. Chipping out of the surface : A coin which has metal chipped out of surface at a certain part of it.
11. Off-centre error : During minting process when the lancet slips out of its place then it is stuck only on a certain part leaving the other part of that side blank.
12. Double strikings : A coin gets removed after getting one strike. But if due to some reason it is not completely ejected out of the striking position then it receives another strike on the part which is exposed. This results in double strikings on the coin.
13. Brockages : This happens when a coin has both the sides with same image. Similar type of coin was seen in the movie ' Sholay '.
Different type of errors found on coins are:
1. Mules : When a coin has obverse (head) die of one coin and reverse (tail) die of another.
2. Blank planchet : When both the sides (observe & reverse) of a coin is plain.
3. One side blank : When any one side of a coin is plain.
4. Discoloration : This happens when accidentally different metals are used.
5. Die rotation error : When the images on both sides of a coin are at different angle with each other.
6. Die crack error : This happens when the die breaks during minting or if a broken die is used during minting.
7. Ghosting error : When the impression on one side of coin is seen on another side also.
8. Broken edge error : When a part of the edge of a coin is broken.
9. Edge error : When the edge of a coin is found to be different than what is found on same type of coin with same date.
10. Chipping out of the surface : A coin which has metal chipped out of surface at a certain part of it.
11. Off-centre error : During minting process when the lancet slips out of its place then it is stuck only on a certain part leaving the other part of that side blank.
12. Double strikings : A coin gets removed after getting one strike. But if due to some reason it is not completely ejected out of the striking position then it receives another strike on the part which is exposed. This results in double strikings on the coin.
13. Brockages : This happens when a coin has both the sides with same image. Similar type of coin was seen in the movie ' Sholay '.
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