Anna Somers Cocks and Charles Truman (The Thyssen-Bornemisza Collection. Renaissance jewels, gold boxes and objets de vertu, London, 1984, p. 31, fig. 16) illustrate another enamel by Aubert depicting Louis XV and state that "Aubert's enamel appears to have been popular and distinctive, for so far as is known only one example of his work is signed (fig 16), and yet enamels are frequently ascribed to his hand in eighteenth-century documents." Aubert was baptized in 1721 and died as early as 1755, and the present enamel is an interesting addition to Aubert's oeuvre.