Help identifying some silver marks

I have a set of candlesticks with 4 symbols, the letters GA in a rectangle, a rosette, a Bitannia symbol and an odd symbol that may be a letter O.
I have tried my best to photograph them and any help will be much appreciated

I have managed to get a slightly better photo
Closeup A.jpg
Closeup b.jpg

Your candlesticks were assayed in Sheffield in 1988 and are of Britannia Silver fineness ie: .958 standard. I’m not familiar with the maker’s mark. Maybe someone else can venture some information there or you could check with the Sheffield Assay office who should be able to help you with identification.


Thanks for the info