Constantine IV, AV Solidus 

Obv: dN CONSTANIYS C COI - Crowned bust facing, holding cross on globe.
Rev: VICTORIA AVGV and officina letter, Cross potent on three steps flanked by Heraclius and Tiberius, each crowned and holding globus cruciger. 674-681 (Constantinople).
Exe: CONOB - 

SB 1147; MIB 1B 

with permission of Numismatica Ars Classica, Nov. 2010.