JLR: This type was an Antiochene issue under both Justin I (e.g., Co 357, Co 374) and Justinian I, but the scale of the design and the obverse portrait of this coin favor its identification with Justininian.
“Co 1261 (Late Roman bronze coin of Justinian I from Antioch).” In Kenchreai Archaeological Archive, edited by J.L. Rife and S. Heath. The American Excavations at Kenchreai, 2013-2024. <http://kenchreai.org/ke/co1261>