Made by Meriden Britannia Co. Electro-plated and not silver as Komo has mentioned. Britannia is an alloy of non-silver metals similar to pewter which takes plating well. I am not aware of any form of date marking used by this company.
The Pewter Society has a database of pewterers, which will show changes made to their marks, and that might help you pin the date down.
Didn't check, so didn't know they were American. I'm sure they will also have a pewter society. Also: https://www.silvercollection.it/MERIDENBRITANNIACO.html