Excellent follis of Heraclius (610-641 AD), mint of Constantinopolis, Byzantine Empire

Heraclius and Heraclius Constantine standing facing, cross between their heads, dd NN hERACLIVS ET hERA CONST PP A / Large M on reverse, A/N/N/O to the left, uncertain regnal year. Overstruck. BMC 116-144. 26mm, 9.6grams, bronze