hallmark

Can somebody pls help me in reading the attached photo of an hallmark?
I suppose it is about an item in silver produced in Sheffield in 1918 (this due to letter a into a shield) but I don’t know what letter B could mean.
Thank you for your help.
Rosanna
punzone portapenne.jpg

This is not a Sheffield hallmark, however much it purports to be. My first thought was that it might be a Chinese exporter’s mark, but the style of the hallmark which it is imitating was only introduced in 1918 and Chinese export wares tended, I believe, to be 19th century. It probably won’t help but can you post a picture of the whole object please.

Thk u very much for replying.
Here are 2 photos of the item wich measures cm. 8 x 5,5 x 12,5 h.
I think it could be a pencil stand.
What do you think?
part.portapenne.jpg
portapenne 1.jpg

It could certainly be a pencil holder. There are no clues for me in its style as to its origins. Does anybody else have any ideas?