A LOUIS XVI ENAMELLED VARI-COLOUR GOLD SNUFF-BOX BY MELCHOIR-RENé BARRE (FL. 1768-1791), MARKED, PARIS, 1779/1780, WITH THE CHARGE AND DECHARGE MARKS OF JEAN-BAPTISTE FOUACHE 1774-1780, STAMPED WITH A FRENCH POST-1838 RESTRICTED WARRANTY MARK FOR GOLD oval box, the cover, sides and base set with panels of translucent dark-blue enamel on an engine-turned ground stamped at intervals with pellets, within entrelac vari-colour gold sablé borders and pilasters hung with foliate swags, the cover set with an oval enamel plaque depicting a scene from the classics within a raised beaded gold frame 3 1/8 in. (80 mm.) wide