Vermeule: Red Jasper. Intaglio. (Modern gilt pendant setting) Bust of Zeus Serapis with kalathos facing left, cornucopia in front of him, a small Victory holding out a wreath behind him, a dolphin beneath him. (Symbol of eternity).
Berges, Dietrich K. Antike Siegel und Glasgemmen der Sammlung Maxwell Sommerville: im University of Pennsylvania Museum of Archaeology and Anthropology. Mainz am Rhein: Verlag Philipp von Zabern, 2002. Page/Fig./Plate: 78 See: p. 42, no. 157; taf. 31
Vermeule, Cornelius C. The Sommerville Gem Collection of the University Museum of Archaeology and Anthropology. The University Museum, 1956. See: no. 309
