I see many off metal coins on eBay, and I was wondering how these are fount exactly? Would a Nicole on a copper planchet be found in a box of pennies? A quarter on a Nicole in a Nicole box, or a penny in a dime(my favorite) in a dime box? Here one of the most beautiful coin errors I've seen so far:
You mean an overstrike? Offmetal is when a different blank planchet is used. Overstrike would be the best word to describe this situation. I do not consider overstrike as error as in most cases, old coins were intentionally reused to be overstruck as new coins. As in this case, I would classify this as "mint sports".
I'm actually talking, for instance, a Nicole on penny stock, I just put that double denomination in there as just one of my favorite coin errors
Your's is not a question that has a black or white answer. Sometimes they come in rolls, sometimes in bags, and sometimes you buy them on eBay or from dealers.
A wrong planchet error would most likely appear in a box of the denomination that was struck on the planchet. A nickel struck on a cent planchet would most likely show up in a box of nickels not a box of cents. Why? Because it came out of the press striking nckels, was mixed in with all the other nickels, was bagged into a ballistic bag of nickels and was dumping into the machine making nickel rolls. There is no way that individual coin would be plucked out of all those nickels, and then taken over and put in with all the cents.
Error coins from mint rolls, bags etc. Are no longer found! Unless you buy old sealed bags,or rolls from years ago. The US mint has quality assurance in place these days where most are screened before packaging. Then they are waffled . Today technology is unreal . I work in the food business same type technology is in place. As say packing lunch meats. The log is examined by 5 quality control events. By human eye, and by 4 other machines. When the log is being sliced to package. The machine knows of any voids in the product. { voids = air pockets, foreign objects, etc.} When the log is sliced the machine kicks out these voids. Thus the package weight is correct for retail sale. As well as the product quality is to our standards . I won't say it can't happen to find an error but most likely not ever to happen.
I recently watched a video on the internet of a very excited coin roll hunter coming out of a bank with a vast amount of pennies. The luck was that he happened to be stood behind some elderly gentleman which was cashing in his 50+ yr old collection of rolled wheat cents. Being in the right place at the right time can be rewarding. Where and when?? Who knows.
Two problems, one an off-metal or nickel on cent or quarter on dime, is not going to circulate long if at all before it is noticed and pulled. A quarter on a nickel MIGHT circulate briefly as the size is close and the color is right, but even that is going to get pulled very fast. Secondly the coin struck on a smaller planchet will not go through a counting machine set for the smaller coin. They are typically slightly larger than the intended coin and often slightly misshapen. So they jam the machines and are removed.
I found my off metal error at the bank. I would imagine that most are found with the coins that have the correct metal such as rolls and bags.