I recently got this coin; which is my smallest Constantinopolis minimi. It is unofficial meaning that it was not struck by the Roman government. This one is-- 9mm 0.5g The galley and Victory are facing the wrong way...the description from translated French was "the reverse is reverse" here is an official example for comparison Constantinopolis A.D. 330-333 17x19mm 2.4g Obv. CONSTAN-TINOPOLI laureate, helmeted, wearing imperial mantle, holding scepter. Rev. Victory stg. on prow, holding long scepter in r. hand, and resting l. hand on shield. in ex. CONSIA RIC VII Constantinople 63 and here is an unofficial issue that is close in size to the official types, though it's crude style and use of an VRBS ROMA obverse gives it away. VRBS ROMA/ Constantinopolis Circa A.D. 330-331 16mm 1.9g Obv. VRBIS ROMA; Roma, helmeted bust left, wearing imperial cloak. Rev. Victory stg. on prow, holding long scepter in r. hand, and resting l. hand on shield, seen from side. In ex. PLG Cf. RIC VII Lyons 241, 242 Ex 1989 Nether Compton (Dorset) Hoard
