This is the mark of the Hartford Sterling Co of Philadelphia PA. Despite the name they also made electroplate so if your platter does not have “sterling” on it then it is electroplate. They were in business from about 1900 to around 1931.
Hi Phil, Thank you. Can you tell me what each stamp means? The lion face, the crown and the other animal?
Ok thanks again,I appreciate the help.
Neither have any particular value.