Tracing this hallmark

Hello, I have been trying to decipher the hallmark on a pair of salt cups (at least I think that’s what they are). I found an entry in this site that related to Coopers Brothers, I think the hallmark matches mine.

Can anyone help me identify what these are, how old they are, the makers - basically anything about them?

The were in the estate of my aunt and I have no-one to ask their history; all I know is that they are Silver Plate.

Here are some pics: