Clarté, an Art Deco silver and lacquer purse clock

Clarté, an Art Deco silver and lacquer purse clock, 1920s, the circular white dial with Arabic numeral indicators and blued steel hands, within a silver case of rectangular outline, applied with black, cream and red lacquer with a stylised flower to one corner, the hinged lid opening to reveal a winder, measuring 4.6 x 3.5 x 1.3cm, manual winding movement, case signed Clarté, French patent mark, partial British import hallmark for silver