See Tamara Préaud, The Sèvres Porcelain Manufactory, Alexandre Brongniart and the Triumph of Art and Industry, 1800-1847, Bard Exhibition Catalogue, New Haven, 1997, p. 173, for a watercolour and pencil on paper draftman's design for this work, also dated 1803.
Here it is suggested that the rendering might have been produced by Charles-Eloi Asselin. The entry also records a delivery to the Emperor on December 5, 1804 of seventy-two assiette unie with tortoise-shell ground, priced at fifty-four francs each - Registry Vbb 2, fol. 6v. It is likely that the present example as well as the identically marked example sold Christie's New York, 24 April 2002, lot 30 was part of this order.