Lot Essay
Cf. S. H. Auth, Ancient Glass at the Newark Museum, Newark, 1976, p. 119, no. 145 for similar, described as an inkwell; A. von Saldern et al., Gläser der Antike: Sammlung Erwin Oppenländer, Köln, 1974, no. 298; and J. B. Hayes, Roman and Pre-Roman Glass in the Royal Ontario Museum, Toronto, 1975, no. 129.