A late 19th century gold and enamel mounted rock crystal hand seal

A late 19th century gold and enamel mounted rock crystal hand seal, unmarked, tapering circular handle with a painted shamrock, the gold mount inscribed, 'Rosemary for Remembrance', the matrix engraved with a sprig of rosemary, and with five bands of enamel decoration, in a fitted case, length 6.5cm.