Constantine V Copronymus, with Leo IV (741-775) AE Follis (Bronze, 19mm, 1.82g) Constantinople, 751-769(?).
Obv: Crowned and draped facing busts of Constantine V and Leo IV; cross above
Rev: Crowned facing bust of Leo III, wearing loros and holding cross potent, set on horizontal bar; cross to right; below bar, large M between X-N; A below M.
Ref: Sear 1556.