Justin II and Sophia, AE28-30 follis, Arabic imitation, Scythopolis, Palestine mint, after AD 641. 

CKYQO-OPOLHC, Justin left and Sophia right, seated facing on double-throne, each holding a long sceptre and resting one hand on knee, cross between their heads.
Large M, ANNO to left, cross above, GII (Year 8) in right field, diamond (representing an "A") below.
Mintmark NIKO.

Album 98; Walker, Arab-Byzantine 1; Berman 16; Gerash hoard 497 (this coin).

Image from the Gerash hoard.