The tablet is in the form of a small tabula ansata, often used as the frame for dedicatory or funerary inscriptions. Here it is inscribed on both sides with a dedication in Greek to the Egyptian god Serapis.
Richter, Gisela M. A. 1924. "Inscriptions in the Classical Collection." Bulletin of the Metropolitan Museum of Art, 19 (7): p. 166.
Bodel, John P. and Stephen Tracy. 1997. Greek and Latin Inscriptions in the USA: A Checklist. p. 193, Rome: The American Academy in Rome.
Lightfoot, Christopher S. 2014. Ennion: Master of Roman Glass. p. 27, fig. 17, p. 29, New York: The Metropolitan Museum of Art.