19th cent pewter plate. 

Pewter used to eat or drink with at the time was known as "sadware" and this example can be dated a bit from some clues in the metal. 

Engraving on rim reads "1814" and original owner's name, which fits with the practice at the time of diners keeping personal sadware at taverns or inns for their exclusive use. This is also in line with popular rim style of the day.

Worn makers stamps on back are still visible of three angels, marking it as Schott Niz 

In fantastic condition for being 200+ years. Repair seam underside (see pics)

Approx. 8.5"