Not sure of date of plate. Including chrome/metal border, measures 11.5" in diameter. Chrome/metal border is 1.25" wide. Says on back: "Golden Maine, Made for Farberware by the Sebring Pottery Co., Sebring, Ohio, Reg. US Post Off. No. 23044?" (can't read last number).
Has crazing and discoloration normal with age. Some scuffing/marks on back but nothing big. Some light scuffing/markings on front but nothing significant.