A Coral and White-Glazed 'Chilong' Libation Cup Qing Dynasty, Late 18th / Early 19th Century

finely potted in imitation of a rhinoceros horn libation cup, rising from a splayed foot to a flared rim, set with a channelled spout opposite a coral-enamelled chilong, the body finely decorated with a broad floral diapered ground above a raised band enclosing floral scrolls, the inner mouthrim detailed with a key-fret band