The cavetto is decorated with a blue diaper/trellis pattern with blue spearheads. The center contains the Bruce armorial. The reverse has the remnants of an old label and a label with the name Bruce. There are glaze hairlines and a glaze firing flaw which do not appear on the front.
In his book Chinese Armorial Porcelain V. 2, at page 569, David Howard notes that this armorial is borne by two branches of the Bruce family, each branch having notable members. The item "18th Century Chinese Export Blue & White Armorial Plate Bruce" is in sale since Tuesday, June 23, 2020. This item is in the category "Antiques\Asian Antiques\China\Plates".
The seller is "rjruble2" and is located in Rochester, New York. This item can be shipped worldwide.