It is a nice reverse, the obverse not so much. The reverse portrait of her reminds me of a coin obverse from nearly 2,400 years previously Troas, Gergis. Circa 4th-3rd Century BC. AE12mm, 1.28 g. Head of Sibyl Herophile right, three-quarters facing / ΓEΡ, Sphinx sitting right. SNG von Aulock 1515; SNG Ashmolean 1147; SNG Cop 338