Watch List notes:

Syria, Seleukis and Pieria. Antiochia ad Orontem. semi-autonomous issue under Roman rule. 39/18 B.C. AE 22 (21.64 mm, 7.38 g, 12 h). Caesarian era civic issue. struck 27/6 B.C. Laureate head of Zeus right / [ΑΝ]ΤΙΟΧΕ[ΩΝ] / [ΜΗ]ΤΡΟΠΟ[ΛΕΩΣ] // AYTONOMOY, Zeus enthroned left holding Nike and scepter / ΓK (= Caesarian yr. 23 = 27/6 B.C.). RPC 4237-9. near VF / F, dark green patina with minor reddish encrustation. 

This year is not cited separately in RPC - I assume just an omission due to limited specimens