I got out to an 1860 era park with spring for 45 min. at dark with millions of 2-5" deep rusted old crown caps.In an erea about 250' radius of the old spring you will almost always get 1 and up to 3 caps per 6" plug and I do not exgagerate.In all metal ferous with 2 tones you can hunt if you can stand all the low metal tones.I found the old eagle button that gave a good high tone in the hole with a cap.If it is not raining in the morning may go back and try with the little coil as I know there are a lot of old coins hidden among all those caps.the button is 9/16" across and has stars all the way around it with eagle in the middle with spread wings and head facing the left.Looks like a wire fastener on back.Sorry about the sad pictures but it is not very plain even with a loupe,Ray.
PS any help on what it is or how old would be much appreciated.
PS any help on what it is or how old would be much appreciated.