This large (9-1/2") plate is marked in blue on the back: PATENT IRONSTONE CHINA within a banner with a crown above. On page 46 of Godden's "Mason's Patent Ironstone China: The Illustrated Guide", 1971, he dates this mark 1813-1815.
The Mason's Collectors' Club code for this "Mogul" pattern is: OA1.
There are no cracks, no crazing and no repairs. It rings nicely when tapped. There is a shallow chip to the enamel of the tall blue vase.
Note: I have a second, matching plate for sale here in my Ruby Lane shop which is in pristine condition.
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Antique Mason's Ironstone Plate "Mogul", Early 19th C (#2)