Unrecorded trademark?

[OldSchool]

I've not come across this very distinctive trademark previously, so would welcome any advice from members here. The mark appears on a silver-plated salver, and is the only visible mark. It shows the outline of a silversmith, wearing an apron and holding a tray, all within a triangular double-pinstripe border.

The salver:


The mark, in situ:


Close-up of the mark, slightly enhanced:


Any information, gratefully received. Thanks.