Queens Antiques and Collectables has dated this piece to the Georgian era.
Opening to reveal a gilded floral pierced grille. The exterior with coral to the lid & a beautifully engraved leaf design to the base.

Measuring 2.8 cm x 1.9 cm and weighs 9.3 grams.
the vinaigrette shuts but there is a small gap visible.
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