Web site: https://www.butlersantiques.com/
This fine decanter has panel-cut neck and shoulders and three incise-cut neck rings. It is marginally less than a magnum*. The base has a band of fluting and the decanter is fitted with a bevelled pear-shaped stopper (replaced). The body of the decanter is wheel engraved with the initials WHA. Georgian magnum decanters are hard to find, and have become a rarity on the market. This is an early example with contemporary prettily-engraved initials.
* Decanters which hold just less than two bottles are said in some circles to be 'port magnums'. This is because port throws a sediment, and the amount of clear wine left when decanted is less than a full 2 bottles.