Hola Manolus.
Me parece un Hyperperon de Miguel VIII:
Michael VIII Palaeologus, 1261-1282 AD. AV Hyperpyron (4.18 gm). Bust of Mary, hands raised, within city walls / Archangel Michael presenting Michael, kneeling before Christ, who holds a scroll. DOC V type IIIa; SB 2242.
http://wildwinds.com/coins/byz/michael_VIII/sb2242.jpg
Un saludo
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"Qvod tibi fieri non vis, alteri non feceris"