Bolskan, Spain AE unit, 25 mm, 9.97 g. 150-100 BC. 

Male bare head right, dolphin swimming downwards behind head.
Horseman galloping right holding with couched spear, star above, Iberian bolskan' below. 

SNG BM Spain 734-737; Villaronga ACIP 1419. 

With permission of cngcoins.com, June 2015	
Estimate: $100.