I've been checking it out farther, and found that the disk part is not steel or iron, but a heavy nonferris metal. Too heavy to be aluminum, unless alloyed with something heavy (zinc?). Too hard to be lead. Too light in color to be copper or brass. Utilitarian hardware is not made of silver (drat). It's electrically conductive and non magnetic.
All of which tells me .......nothing.
The item was found 7" down, and 3 or 4 paces out my back door. location would be 50 yards from the Neversink river in NY.
Area (Sullivan co.) has a history of farming (bottom land), trapping, tanneries, lumber mills, etc. When the animals and all the good tan bark trees were gone the farmers and local people turned to tourism.
During WWI, when knowone was vacationing in Europe, they built hotels here. You may know the area as the Catskills or the Borscht Belt. I doubt that this belonged to Henny Youngman, though.
I've found horse shoes not more than a couple of yards from where I found this.
Bluezman