W.B. Honey, Catalogue of the Porcelain and Pottery both Oriental and European in the Collection of Earl Spencer at Althorp, 1937.
Perhaps (IV) VINCENNES AND SEVRES, no. 454, SERVICE...Painted with festooned blue flowers. Various Sèvres marks, the earliest date letter 'K', some pieces replacements made probably at Worcester. 1763 and later. It is divided in the 1910 inventory under Nos: X73, X74, X187, X305 and X306.