Web site: https://www.butlersantiques.com/
The shape of this Georgian decanter is between a 'prussian' and a 'nelson' - if the lower secion of the body curved in more, it would be a 'prussian', but it is not quite parallel-sided (which it would need to be to be called a 'nelson'! Whatever name you chose to give it, it is still a handsome decanter.
The decanter is heavily blown in good clear glass and has three applied neck rings below a flanged rim, and it has target or bull's eye stopper.
It is very fit for purpose, having no chips or cracks and is bright and clear and it holds a full bottle of wine with ease.
Dimensions: 11.2", 28.4 cm. Incl stoppers