Woodbridge Antiques has dated this piece to the 1940s.
The hallmarks are also clearly visible on the underneath of the lid

Condition: In lovely antique condition.
Hallmarks and maker's marks: London 1937 by Burns, Oats & Washbourne Ltd.
Measurements:
Height: 1.5 cm approx.
Diameter width: 2.8 cm approx.
Weight: 10.59 grams approx.
Woodbridge Antiques has dated this piece to the 1940s.
Specialists in quality antique silver, fine jewellery & accessories
You can view the stock and full dealer information on the Woodbridge Antiques Profile Page