of rectangular form with rounded edges, the top panel set with a miniature enameled painting after Columbus Breaking the Egg by William Hogarth, the central panel is surrounded by a gold frame flanked by a pair of caryatids on a stippled ground, the side and base panels with an engine-turned design, each of the snuff box faces with a border of cobalt blue champlevé enamel, 9 cm (3 1/2 in.), the interior with a makers mark MM, partially legible hallmark on the inside, additional mark A> on the inside fitting, 121.9 g.