Bastareus, king of Paeonia, AR tetradrachm, ca 400 BC. 13.14 g.

Large crested helmet right in border of dots.
BASTAREOS above bull butting right, head facing, in border of dots.

Paris 20; AMNG III, 16; Allatini coll. 232; Head HN p. 237 (this coin); Svoronos, HPM, pl. XIX, 2.

With permission of M&M Numismatics, The New York Sale XXVII, lot 322.
Ex Allatini coll. 232 (Sotheby 1904)

Note: Beware of modern Bulgarian fakes (see below)! Compare the small details, especially of the helmet crest and ear flap.