Constantine VI & Irene (780-797) AE Follis (Bronze, 21mm, 1.41g) Constantinople, 790-792.
Obv: Crowned facing busts of Constantine and Irene; Irene hold cruciform sceptre
Rev: Crwned facing busts of Leo III, Constantine V and Leo IV; large M flanked by X N below.
Ref: DOC III 6; Sear 1596.