Trajan. AE 13, dichalkon; Trajan; 98-117 AD, Alexandria, Egypt, Year 16 or 17 = 112/3 or 113/4 AD, Dichalkon, AE 12-13, 2.32g. RPC-4773 or 4819, Emmett-710/16 or 17. Obv: Head of Trajan laureate r., without legend. Rx: Headdress of Isis, date LI - [S or Z] across field. The restored dates in brackets are the only published dates above Year 10 for this type under Trajan, though of course other dates, so far unrecorded, could also have been struck.. F