Three Norwegian thimbles, comprising a silver and blue enamel example with moonstone top by Nils

Three Norwegian thimbles, comprising a silver and blue enamel example with moonstone top by Nils Elvik, internal apex marks '9255 [horse shoe NE mark], a silver example with carnelian top, the body engraved with leaf scrolls, heraldic shield and crown below engraved inscription 'Stavanger', unmarked, and another with bloodstone top, engraved silver body, rim mark '830S', partly struck maker's mark 'HC'?    (3)     From the collection of Celia Barrington