Anyone found a token like this one? Maybe 400 years old?

[boris]

In the Red Book there is much good information to ID things, and my theory is this is a Sommer Islands token III Pence of a different variety? Found after Hurricane Bob in 1991-9 mess covered with rust. Found yet another last week in a hole left by unknown persons at beach with a 2 and 6 nearby. Please help if you know? HH Boris note: very thin and holed as is most of 100s of items and rings here.