A Chinese pair of bronze ritual vessels, Gu, late Shang Dynasty, 13TH/12th century BC. The narrow wine-breakers of exquisite craftsmanship, with flared neck, finely detailed with bands of varying patterns forming different parts of dragons and 'Daodie' masks, lovely patina and some green encrustation, 28.6 and 28.8 cm high. Reference: See Robert Bagley Shang ritual Bronzes in the Arthur M. Sackler Collections, Vol. 1 Washington D.C. 1987, pp217-229.