I'm new to coin roll hunting and am still trying to learn the difference between mint errors and every day wear and tear.
This is a 1999 P Delaware Quarter. The 'E' in "STATE" is missing on the reverse side in the phrase "THE FIRST STATE". The "E" in "THE" and the 'T' in "FIRST" are hard to see also.
This is a filled die with grease on that area. How can I tell? Note the top line is showing wider devices on that area of the weakened device. On the next line it is almost gone because of more Grease Fill on that device. On the third line, it is totally filled. Thus no device shows on the end of that line. All about the die was filed/part filled that leaves the weakened devices:
Hey look at that, the 1999 Delaware 'THE FIRST STAT'.
This type of error you likely have is called a Struck Through Grease filled die (or just "filled die") error." Grease strike throughs are very common for the most part, they're probably the most common error type besides laminations, and in the past normally only grease strikes which have obliterated large areas of the coin have any decent added value. Coop above has some good info. The exception are coin series which are rarely found with errors of any kind. An example would be a 5 oz America the Beautiful coin, which is a series rarely found with any type of errors. But even for a coin like that, the strike through needs to be fairly large to really add much value. At the moment all these grease strike throughs including the minor ones are however generally selling for a small premium despite some being quite common, and some are more popular than others and obviously when enough is missing to entice some of the more serious collectors is where the values tend to be higher. Yours I havent seen before, 2005 seemed to be a big year for greasers as an example, the 2005 Kansas State Quarter "In God We Rust" Error was that same year for example and sells regularly. So likely yours would sell for a minor premium such as on ebay but is not known as an existing one people are seeking out.
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