This is all that is on the bottom of a silver mug my mother just gave me. I looked into Alex Clark Co, but all I can find are the same looking stamped mark but they all then have Walback (or something like that). There are no additional markings on the mug, just what I have in the title.
Is this a knock off? Mother did bring it over from the UK and it does appear to be silver. The handle on the mug is George II in type.
Any help on this would be appreciated. All internet research has failed to show any marks that only say “The Alex Clark Company Ltd London” (there is an “r” after Alex which I’m assuming is registered trade mark?).