George James Antiques has dated this piece to the Georgian era.
The hallmarks are very clear and it is nice to have the maker's mark to the handle, quite rare. The maker is un-identified, but is shown in Douglas Bennett's definitive book on Irish Georgian silver. If you have an appreciation of good Irish silver, this is for you!
Dublin. 1805. Maker, J.B.
George James Antiques has dated this piece to the Georgian era.
You can view the stock and full dealer information on the George James Antiques Profile Page