Thraco-Macedonian region, AR obol, uncertain mint. 530-515 BC. 8 mm, 0.59 g.

Crab, seen from above.
Incuse square. 

SNG von Aulock 6665; Tzamalis 5.

With permission of cngcoins.com, auction 499, Lot 91, Sept. 2021.
Ex CNG auction 262, lot 18, August 2011.