- May 25, 2023
I found what appears to be cast iron with Pennies inside. I found it using my Garrett ace 250 and when I put the coil towards the top hole it registers as a penny clvery consistently. Unfortunately it seems to be encased in cast iron all around so I don't know what's inside. It doesn't rattle at all. Should I open it? Would it be worth less if I open it, or does the shell not matter?