Not an expert on Alexandrian coins, but it looks like Hadrian to me. Those who know Alexandria coins better: Do you think the portrait style varies more on Hadrians coinage than on those of other emperors?
https://www.acsearch.info/search.html?id=8554705 Roman Provincial Hadrian. Alexandria Diobol; Hadrian; 117-138 AD, Alexandria, Egypt, Year 14 = 129/30 AD, Diobol, 9.98g. RPC-5755 (28 spec.), Cologne-1004, Emmett-1111/14. Obv: AVT KAI - TPAI A?PIA CEB Laureate, draped, cuirassed bust r. Rx: Agathodaimon snake coiled on ground, head bearded and wearing pschent raised and facing r., winged caduceus behind coil on l., wheat ear behind coil on r., date L - I? across field. Ex CNG 53, 15 March 2000, lot 1208 (Philip De Vicci Coll.); ex CNG 37, 20 March 1996, lot 1180.A middle bronze of Roman Egypt of this quality is very rare. MS
Thank you very much, this catalog is very good and everything is there by years, as I expected to look for. The catalog is just great.