Jeff Sims Antiques has dated this piece to the 1910s.
The smaller dimensions suggest that it might have been for a lady's watch. A most interesting and collectable item.

P&P contribution £8.00 UK
£12.00 Worldwide
Condition :- Excellent with no breaks or splits. There is a small dents to the top rim, visible from the back and commensurate with age and use.
Hallmarks :- Clear and readable.
Date :- Birmingham 1911.
Maker :- Joseph Gloster Ltd.
Height :- 7 cms.
Base diameter :- 4 cms.
Watch area diameter :- 3.25 cms.
Watch area depth :- 1.25 cms.
Jeff Sims Antiques has dated this piece to the 1910s.
Specialists in antique silver, glassware and objects of vertu
You can view the stock and full dealer information on the Jeff Sims Antiques Profile Page