The price of copper was so high in 1856 that it was no longer feasible to make a standard-sized penny without ... be valuable is to check it for errors, key dates or strange mint marks, as ...

The date of a coin can make it more valuable, especially if it's in great condition because old coins have more time to be damaged and lose their luster. Certain mint marks can also add or ...

When it comes to valuable ... penny, as The Spruce Crafts outlined. The price of copper was so high in 1856 that it was no longer feasible to make a standard-sized penny without actually losing money ...