Got out for about an hour yesterday. Only found 38 cents, and the only decent sounding signal I got was this old Jell-O mold. It was a good 4-6 inches down. Guessing it was from the 60's.
I've seen a site that claims those are from the 50's. I tend to agree. Lots of aluminum stuff made in the 50's. cool find! there's always room for jell-o