Tilled my garden a couple weeks ago. Found another foundation while tilling. Maybe an out house? Small about a 5' square. Detected it today and found alot of iron and this. Have not found a good ID on it yet. Back totally trashed. Not sure it is a button or token. Across the top it says in rembrance of the centennial July 1876 across the bottom it says independance hall is in 1776