Woodbridge Antiques has dated this piece to the 1920s.
The silvermaker's marks are also visible for John Rose.

This napkin has a lovely clean crisp and stylish appearance!
Condition: In lovely antique condition.
Hallmarks and maker's marks: Birmingham 1912 by John Rose
Measurements:
Height: 2 cm approx.
Diameter width: 4.4 cm approx.
Weight: 17.7 grams approx.
Woodbridge Antiques has dated this piece to the 1920s.
Specialists in quality antique silver, fine jewellery & accessories
You can view the stock and full dealer information on the Woodbridge Antiques Profile Page