Samothrace, Thrace. AR 6.5 mm, obol. ca 500-465. 0.56 g. 

Forepart of sphinx right.
Quadripartite incuse square. 

Schwabacher, Fund 5a; Hoover HGC 307.
Very rare.

With permission of cngcoins.com, auction 106, Lot 79, Sept 2017