DeepseekerADS,
The first picture shows the makers mark. The pictures really dont show how the mark looks in real life. you can see it on the right of the drum on the second pic as well.
poorman15,
Iron was exactly what i was doing in the yard. I was checking out some disc. settings in a spot in my yard with a bunch of rusty nails. I'm with you about the iron hides alot of good stuff. I usually dig most hits and have found many items after i've taken a nail or an iron chunk out of the hole and then rechecked the hole.