Leo IV the Khazar, with Constantine VI, 775-780. Miliaresion (Silver, 20 mm, 1.71 g, 12 h), Constantinopolis. IҺSЧS XRISTЧS ҺICA Cross potent set on three steps. Rev. LЄOҺ / S COҺST/AҺTIҺЄ Є / C ΘЄЧ ЬA/SILIS in five lines. DOC 3. SB 1585. Rare. A nicely toned example. Traces of overstriking, otherwise, very fine.
This coin was overstruck on an Umayyad dirhem, with parts of the undertype still visible.