Antique 14ct gold mounted hardstone & mother of pearl triple desk seal, formed as a mother of pearl first emerging from a chalcedony sleeve and clasping a baton, leaf chased gold mounts, the smaller lapis and green chalcedony matrix carved with a dog and a bird, the main slate matrix engraved with a thistle and 'DINNA FORGET' with a turquoise bead gold band. England, circa 1840, 6 cm