Robert Bush Antiques has dated this piece to the Edwardian era.
They're hallmarked for Birmingham 1911 with the silversmiths mark for William Devenport.
They weigh 46 grams / 1.4 troy oz the pair and have a super grape and vine decoration with no inscriptions.

They're in excellent condition and ready to use though there is some wear to the inside of the box.
These lovely napkin rings will come with a certificate of authenticity.
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Robert Bush Antiques has dated this piece to the Edwardian era.
Antique georgian, victorian & edwardian silverware & collectables, antique boxes and caddies and decorative items.
You can view the stock and full dealer information on the Robert Bush Antiques Profile Page
Robert Bush Antiques is a registered member of LAPADA