According to my copy of Jackson’s Hallmarks, there are some characteristics of the stampings in your case that might indicate that the case was imported for Benson. In particular, the shape of the shield around the leopard indicates an import. The presence of the crown might be the standard mark for an imported item of either 22-karat, or 18-karat. My reference shows the date letter in your case as pertaining to sterling silver for the years 1918-19. Did gold and silver articles share the same date letters? My Jackson book indicates that, up until 1856, gold and silver date letters were the same. My reference also implies (to me) that there is a karat stamp (18 or 22) that should be there. Perhaps one our learned members who have a better understanding of British markings than I do, might reply.
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