Watch List notes:

BYZANTINE EMPIRE: Constans II, 641-668, AV solidus (4.44g), Constantinople, S-964, busts of Constans with long beard & moustache, wearing plumed helmet, and Constantine IV beardless // cross potent on three steps between Heraclius and Tiberius, officina Δ pleasant strike, EF.

Estimate: 300-375 USD