[Scrambler Bob]

All I ever find is old pull tabs and pop bottle tops............
= = =

Depending on your State, they may be subject to the 50-year old antiquities rule, and are to be left undisturbed.

[Red Badger]

I did find an old arrowhead once in a bayou fishing....................

[Axenolith]

The law is 100 years, and bullets, coins, are exempt. Some places try to squeeze the age down, but that’s bureaucratic of local official personal edict.