Watch List notes:

Africa. Egypt. AR Tetradrachm, c. 5th-4th century BC. Eastern imitation, Egyptian (?). D/ Head of Athena right, helmeted, with frontal eye; on cheek, countermark: bird in flight or lily. R/ Owl standing right, head facing; behind, olive sprig and crescent. SNG Munich 57. AR. g. 16.70 mm. 26.00 A few scratches on the reverse. Good VF/VF.

About the interesting countermark see P. van Alfen, AJN 14 (2002), pp. 4 f., 61.