The World is Made of Glass Ltd. has dated this Bristol Blue Glass Decanter to the 19th Century.
The decanter is in excellent condition for its age.

The decanter has a gilded everted pouring lip and is round in cross-section. The decanter is decorated with a gilt faux label for Brandy "suspended" from a gilt chain. The base carries a rough pontil mark and measures 7 cm (2.8 inches) in diameter. The decanter measures 19 cm (7.6 inches) in height without the stopper and 24.5 cm (9.8 inches) with the stopper inserted.

The stopper is of similar metal but is probably not the original. It has no gilded "B" on it as we would expect and is somewhat plain, with little ornamentation. It is a good fit, is of the right period and metal, and looks the part.
There are no chips, cracks, significant scratches or any other obvious evidence of restoration. The gilding is rubbed in places.
It weighs in at 340 g. (~ 12 oz.).
The World is Made of Glass Ltd. has dated this Bristol Blue Glass Decanter to the 19th Century.
Dealing in antique and collectable glass from the 17th to the 21st century.
You can view the stock and full dealer information on the The World is Made of Glass Ltd. Profile Page