In 1753, the Vincennes factory introduced a marking system that indicated the year the object was decorated. Prior to 1753, the factory had begun to mark the base of each piece with interlaced Ls, the royal cipher. Beginning at some point in 1753, a letter that represented a year was painted inside the interlaced Ls. For the first ten years of this marking system, the letter actually indicates a two-year period, as the new letter was adopted during the year rather than at its start (i.e., A = 1753/54). This practice changed in 1763, allowing a letter to signify a single year.
Marking: Painted in blue, on underside:  Crossed L's enclosing A (Vincennes factory mark and year letter for 1753/4);  decorator's mark of Louis-Jean Thévenet père
Incised under glaze on top of one foot:  b (unidentified).
Gilbert Lévy ; Mr. and Mrs. Charles Wrightsman , New York (until 1976; to MMA)