EXHIBITED AND PUBLISHED:
50th Anniversary Exhibition of The Circle of Glass Collectors, Broadfield House Glass Museum and The Pilkington Glass Museum, 1987-1988, no. 4.
Cf. E. M. Stern, Roman Mold-blown Glass, The Toledo Museum of Art, 1995, pp. 113-129 for the type and a detailed discussion of the variations to the moulds and symbolism.