While visiting the Biltmore Estate near Ashville, North Carolina, USA. I saw this plate in with a collection of other sea creature themed china serving dishes found in the Breakfast Room on the first floor. This purple serving dish appears to be based off a scallop.
The house is the largest private house in the United States and was completed in 1895 by George Washington Vanderbilt II . Learn more about how to visit the Biltmore Estate at their web site.