Average condition - reverse and perimeter are iron (slightly magnetic) and rusted. We are dating it from the other artifacts found within a 10-foot radius. These items include 4 Chinese 1 Cash coins accurately dated as Qianlong Tongbao; Boo-chiowan minted 1736-1800. https://en.numista.com/catalogue/pieces1133.html
Weight is 6.21 grams.
Width is 27.76 millimeters.