Heading : Bristol blue brandy barrel decanter
Date : c1820
Period : Regency
Origin : England 
Colour : Inky blue
Stopper : Ball stopper with gilding
Body : Gilded "Brandy" within a gilded octagonal border
Base : Broad polished pontil 
Glass Type : Lead.
Size :  20.5  cm to top of stopper
Condition : Excellent, no chips or cracks 
Restoration : None 
Weight : 544 grams

References :

Collecting Decanters By Jane Hollingworth – Page 75 Plate 44.

The Decanter an Illustrated history of glass from 1650 By Andy McConnell  – Page 221 Plate 315.

The Decanter Ancient to Modern By Andy McConnell Page 158 Plate 4