Flora Fauna Antiques has dated this piece to the 1930s.
Condition: Excellent with nice, clear hallmarks. The case is in nice order. The fasteners work well. Nice and clean inside, just a few minor marks on the cream coloured liner.

Fully hallmarked as follows:
Maker's mark: S Co (into 2 conjoined circles)
Birmingham assay office
Lion passant
Date letter for 1932
Jeweller retail details on the inside of the lid:
Watchmaker to the Admiralty
Edward Ewen
F.S.M.C B.O.A
London
Dumfries
Measurements:
Length: 9.2cm
Width of bowl: 2.1cm
Combined weight: 42g
Flora Fauna Antiques has dated this piece to the 1930s.
You can view the stock and full dealer information on the Flora Fauna Antiques Profile Page