Silver Mark ???

Hi all
I have a thimble that I believe is silver. This thimble has a mark on it, which looks like three bells on a shield, there are no other markings.
Does anyone out there know this mark.
Many thanks

I think those are three thimbles. Might be the mark of the British firm Charles Iles.

Since there are no British sterling silver hallmarks it is probably nickel silver or some other base metal.