40 Nummi - Constans II Constantinopolis

These issues fall within the most turbulent stretch of Constans II's reign — the years immediately following the Arab conquest of Egypt, which severed Byzantium from its wealthiest province and devastated imperial revenues. The fiscal strain is directly legible in the coinage: flans from this period are frequently underweight, poorly prepared, and struck off-center at rates that dwarf earlier Constantinople production.

BCV 1010 corresponds to a phase when the follis had already shed most of its weight across successive reductions since Justinian. By the 650s the 40-nummi piece was a denomination in name only.