Nautilus shell; engraved with a dancing Bacchus child and with nymph and amor; An engraved and black-rubbed nautilus shell. On one side a nymph with a triangle and a dancing Bacchus child and on the other side a nymph with a tambourine and a dancing Amor.; Cornelis Bellekin (attributed to); Amsterdam; 1650 - 1700; mother of pearl; engraving; h 10.7 cm x w 9.8 cm x d 6.8 cm