Coins are struck or minted. Dollar bills are printed.
There are many different kinds of mistakes that can occur when a coin is minted. Most aren't worth much but some are quite valuable. You'll need to post a new question with a more detailed description of the suspected error.
This is a novelty coin not made by the US mint and has no collectible value.
A US penny is .950 coppre .050 zinc
Please post a new, separate question with more information describing the misprint. Paper currency is subject to several kinds of errors and each has a different value.
The die was filled with grease or crud and caused the "D" mintmark to fail to strike up. This is a common error and adds no value.
A Penny..the other day I found a penny from the 20s. Its still a penny not much as changed.
This is a novelty coin not made by the US mint and has no collectible value.
The US has never made and never will make silver pennies. If a penny was silver it would be worth more than a dime.
A US penny is .950 coppre .050 zinc
The value of a misprinted US $100 bill can vary depending on the severity and rarity of the misprint. If the misprint is minor or common, it may not significantly affect the value. However, if the misprint is significant or unusual, it could potentially be worth more to collectors. It is recommended to consult with a professional currency appraiser or collector to determine the specific value of a misprinted bill.
Please post a new, separate question with more information describing the misprint. Paper currency is subject to several kinds of errors and each has a different value.
The die was filled with grease or crud and caused the "D" mintmark to fail to strike up. This is a common error and adds no value.
.50
A Penny..the other day I found a penny from the 20s. Its still a penny not much as changed.
For a good condition 1902 us penny it is worth about $1.00. For a 1902 us penny in bad condition is worth about $0.25.
11-8-11>> The current value of a 1978 US proof set is $9.
A dollar or so.
about 1 cent