Leo III the Isaurian with Constantine V (717-741) AE Follis (Bronze, 22mm, 6.76g) Constantinople.
Obv: LЄOҺ S COҺST, Crowned and draped busts of Leo and Constantine facing, each holding akakia.
Rev: Large M between X/X/X and N/N/N; cross above, A below.
Ref: Sear 1516.