A late 18th / early 19th century domed chalcedony intaglio depicting the opposed heads of a...
A late 18th / early 19th century domed chalcedony intaglio depicting the opposed heads of a bearded Silenus and a youth, separated by their hair, in a gold swivel fob and watch key, intaglio swings free from the gold serpent mount by lifting a lever, intaglio 2.2cm high