ARAB-BYZANTINE: Justin & Sophia type, late 7th century, AE follis (9.08g), Gerasa, "year 12 ", A-3509G, ABQ-C2 (same dies), mint name in Greek at right, Arabic tayyib countermarked below / capital M, retrograde pseudo-mint name NIKO below (Nikomedia), cross above, 6-point star above the date, Fine to VF, RR.
Estimate: 600- 800 USD