Watch List notes:

Constantine VI and Irene, with Leo III, Constantine V, and Leo IV Æ Nummus. Constantinople, AD 790-792. Crowned facing busts of Constantine VI and Irene, holding globus cruciger and cruciform sceptre respectively; cross above / Crowned facing busts of Constantine V, Leo III and Leo IV surmounting horizontal bar above large M; X and N flanking M, A below.
4.3g 19.6mm