Leo III Tthe "Isaurian", with Constantine V (717-741 AD). Constantinople.
AE Follis (23mm 4.46g)
Obv: The busts of Leo, with short beard, and Constantine facing, both wearing chlamys and crown with cross and holding akakia.
Rev: Large M cross above, XXX in left field and NNN in right field; A below.
Sear 1516.