Watch List notes:

Byzantium, Constantine IV (668-685), AV Solidus, 4.16g, Constantinopolis, helmeted and cuirassed bust three-quarters facing, holding spear, rev. cross on steps, figures beside, a bolder very fine.
Provenance
The Quinn Collection
Purchased Frimarkshuset Skandinavisk Filateli AB (Stockholm), 8 December 1991, lot 3490 - KR1,300
Estimate: £200 - £250