Hi wileyc
congratulations, your
weight ist a late roman/early
byzantine 1/2 argyrike ounce with little overweight.
Turn the
weight 90 ° clockwise and you will see a sign which is wave-like (never the character S).
This sign stands for 1/2. ( see
standard literature). Apart from the argyrike ounce please compare it with the
logarike ounce and the soyalia ounce. The argyrike ounce based on a
weight standard of approx. 28,2 g dated
4th-6th ct. A.D.
For further information don't hesitate to contact me again
regards
Basil