Any of you guys familiar with this backmarK? I dug a cuff size flat button yesterday evening its .560" diameter. Front looks like it may have a design or insignia but its in Bad shape and I can't distinquish it with a magnifier. Back mark is "James Wood Philadelphia" For some reason I cant upload photos to the post. Coins from the site date from 1798 to 1832.

Any info would be appreciated on the backmark
Thanks,