This is a Shenango China restaurant ware oval plate or platter with a green scroll feathery pattern on the rim. The plate is 13" long and 9" wide. The backstamp reads Shenango China USA by Interpace. Several china manufacturers produced green scroll rim patterns with slight variations. I have a lot of other green rim pieces being listed that coordinate well but don't necessarily match.
Shenango China Restaurant Ware Green Scroll Band Oval Platter 13 IN