Watch List notes:

Constantine IV, Pogonatus (668-685). AE Follis, Syracuse mint. Obv. Helmeted and cuirassed bust facing, with short beard, holding spear and shield; traces of undertype. Rev. Large M between facing standing figures of Heraclius and Tiberius; above M, monogram; [in exergue, SCL]; traces of undertype. D.O. 61; MIB 106; Sear 1208. AE. 6.29 g. 18.50 mm. Interesting example, overstruck on a Syracusan follis of Constans II, with significant traces of the undertype. Light brown patina, with green spots. About VF.