The following description was prepared by William Gross:
While pewter plates for Passover and Purim are relatively common, such plates for Shabbat are rarer. This example, which carries the traditional blessing for the wine in an engraved inscription around the rim, could have been used either for the Sabbath eve or for the Havdalah ceremony. The images are both both human and animal figures and seem to be simply folk decorative elements in the design of the plate.
Inscription: Baruch Atah Adonai Eloheynu Melech ha-'Olam Boray Pri ha-Gefen. Nun Aleph Heh