Anna Somers Cocks and Charles Truman (supra) describe the present miniature as follows: '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.' A further oval landscape-shaped enamel portrait of Louis XV by Aubert, signed and dated 1752, was sold Christie's, Geneva, 16 May 1995, lot 198.