Andrew Cox Antiques has dated this piece to the 1910s.
These unusual silver items were given as gifts for weddings or other occasions when a buttonhole is required. A lovely, usable collector's piece. Dimensions below.

Postage and packing :- £8.00 UK.
£16.00 Europe.
£22.00 Outside Europe.
Condition :- Excellent, with no splits, dents or holes.
Hallmarks :- Clear and readable.
Maker :- Francis Webb.
Date :- Birmingham 1911.
Length :- 5.4 cms.
Width (widest point) :- 1.8 cms
Depth :- 1.5 cms
Andrew Cox Antiques has dated this piece to the 1910s.
Specialists in quality antique silver, glassware, jewellery and object de vertu
You can view the stock and full dealer information on the Andrew Cox Antiques Profile Page