Help to identify these marks

British Silver Reading Silver Hallmarks
1

Hi
Could you please help me identify these marks as some are letters and one is not a letter

It reads from left to right

R
P
Symbol which I cant identify
L

The letters on the right at right angles to everything else reads

P.B M

I was thinking that the P.B M was for Plated Brittania Metal but I am not sure[/img]
rsz_img_1746_-_edited_1.jpg

2

It’s the electroplate mark for Robert Pringle & Co - the symbol between the letters depicting crossed axes I think.
You are correct about the other letters, however I would think there would possibly be an ‘E’ before the ‘PBM’ (ElectroPlated Britannia Metal)
Regards
John