Woodbridge Antiques has dated this piece to the 1930s.
The date is not decipherable but the style is typically 1930's.

A lovely item in super antique collector's condition. Would make a wonderful gift.
Hallmarks: Birmingham by Mappin & Webb
Measurements: Height: 2.7 cm Width: 10.4 cm Depth: 11.3 cm Weight: 62.6 grams
Weights and measurements are approximate.
37880
Woodbridge Antiques has dated this piece to the 1930s.
Specialists in quality antique silver, fine jewellery & accessories
You can view the stock and full dealer information on the Woodbridge Antiques Profile Page