Parthian dipinto from Dura-Europos

A heavy reddish sherd (H. 0.075 Br. 0.075 D. 0.03) found in room H 2 of M 7 (O. Yale Inv. 42).R. N. Frye, Inscriptions from Dura Europos in Yale Classical Studies XIV, 1955, 199.MTRY GW-MTTNThis Parthian black dipinto seems to mean “of Mithra the bull- ?” The editor writes: ’I thought of ’bull-slayer’, but unfamiliarity with Palmyrene and North Semitic epigraphy prevents further conjecture’. Below the dipinto, at an interval of 0.03, is the following symbol: Fig. 243