Nice recoveries! When you're finding things like that there's always more.
One time after I dug 2 aluminum can lids in a 10-foot area at a trashy demo property, the third "can lid" turned out to be a 1922 Silver Peace Dollar so. . .
the worst that could happen is you clear the trash and start finding the goodies. As others have said, keep digging and the good stuff will come.