Queens Antiques and Collectables has dated this piece to the Georgian era.
With blank circular cartouche. With hanging loop.

Opening at the side to reveal a gilded pierced grille.
Measuring 2.5 cm in diameter and weighs 6.2 grams.
In very good antique condition, hallmarks are rubbed but legible, gilding is a still bright. Usual signs of wear all commensurate of age and use.
Queens Antiques and Collectables has dated this piece to the Georgian era.
Specialising in georgian & later high quality silver pieces.
You can view the stock and full dealer information on the Queens Antiques and Collectables Profile Page