A pair of engraved Nautilus shell, Nautilus Pompilius
The upper shell pierced and engraved, with the crest cut into a fan pattern, mounted on to another engraved shell.
Nautilus shells were first imported from the East Indies into Holland in the late 17th century. Peeled by acids to reveal the underlying mother of pearl which was then carved or engraved and often mounted on precious metal stands. English examples tend to date from the early 19th century. This example is though to be the survivor of a pair.