Digby Antiques (Wiltshire) has dated this piece to the 1920s.
The hinges are also silver gilt and fully marked.

There are no cracks to the tortoiseshell.
The silk lift out tabs on the top and worn through and one of the implements has a chip to one end.
London 1919 Henry Dumenil.
All the inside fittings lift out so could just be used as a box.
PLEASE NOTE THIS CANNOT BE SHIPPED OUTSIDE THE UK.
L 19 cm
W 14 cm
D 3.5 cm
Digby Antiques (Wiltshire) has dated this piece to the 1920s.
You can view the stock and full dealer information on the Digby Antiques (Wiltshire) Profile Page