I found a 2001 Denver mint penny it a little thinner then a regular penny and sounds different when drop compared to other
@Reggb …drop tests are notoriously unreliable. You need to weigh it, supply some pictures of it and tell us what you have…Spark
Try dropping several different size nails or screws. If they all sound the same please notify me. Of course it sounds different. It’s thinner and makes a different sound. Please post photos.