Watch List notes:

Arab-Byzantine, a Byzantine Follis of Constans II, countermarked with unidentified symbol on obverse, 3.47g (Goodwin A5). Host coin fair, countermark fine, rare.

Reference: Goodwin, T., 'Countermarking in Seventh Century Syria, Part II: Countermarks from after the Arab Conquest', Supplement to ONS Newsletter 183, 2005

Estimate: £50-70