Constantine IV, Pogonatus (668-685). AE Follis, Ravenna mint. D/ Helmeted and cuirassed bust, three-quarter face to right, holding spear and shield. R/ Large M between A/N/N/O and X/X/X; above, [IA]; beneath, Θ; in exergue, RAV. D.O. 92; Ranieri 737-41; Sear 1240. AE. g. 3.49 mm. 19.00 RR. Very rare. Emerald green patina. F/AboutVF.