but they were a little too overzealous and created either a weak "D" mint mark or coins with no mint mark at all. Bottom line ...

Pennies, often overlooked as a mere pocket change, can sometimes hold significant value beyond their face worth. These valuable pennies are sought after by collectors and enthusiasts alike for ...

Missing mint markings: The mint mark is a letter ... of metal used to make coins. Planchet errors mean they might have the wrong shape, wrong thickness and have no engraving at all Strike errors ...