For a similar example in the Metropolitan Museum of Art (accession no. 69.11.6) see pp. 9-10, figs. 1-2 in Oliver, "Persian Export Glass" in Journal of Glass Studies XII. Other similar examples have been found in Rhodes and Ephesus. For the tradition of cast monochrome phialai with petalled rosettes in the Western provinces, see the Canosa Group, fig. 92, p. 186 in Grose, Early Ancient Glass, The Toledo Museum of Art.