This pretty 9-1/2" plate bears the earliest Mason's mark: the impressed linear "MASON'S PATENT IRONSTONE CHINA", plus a blue printed "jeweled curved crown mark", which dates this plate about 1820.
The pattern name preferred by the Transferware Collectors Club is "Turners Willow", as the pattern originated at the William & John Turner Pottery. An alternate name is "Two Man Willow".
The blue and white transferware plate is "shaped" (has scalloped edges). Later plates in this same pattern don't have the scallops.
A full page color photo of this plate (without the scalloped edges) can be seen on page 25 of Geoffrey Godden's "Guide to Ironstone". He says, "This design was, perhaps, the "Blue Chinese Landscape" dinner service pattern included in the 1818 sale catalogue."
There are no chips, but there is some slight crazing to the back side. No discoloration or staining to the front. The plate has two 1/4" hairline cracks visible on the back edge (see photo). Surprisingly, it still has a nice ring when tapped.