Hello! I am in need of identifying whether a heavy silver tray I own is sterling or plate. I have attached a picture of the front, but my camera will not allow me to focus on the maker’s mark on the back. The mark says:
_ _ _ & S (in Old English lettering, but illegible)
I (in a box) S (in a box)
INTERNATIONAL SILVER CO
Nowhere does the word “sterling” appear.
Any help you can give me would be deeply appreciated,