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Panormos 300-275 BC AE AE17 2.64 g 1.7 cm 1.65 cm 7h

obverse: hd Zeus r
reverse: horse l galloping, sun obove ΠA monogram below
Calciati CNS I p 340 61 var, Hoover HCS 1073 var
Munthandel G. Henzen list 163 (Sept 2005) 36 

here hd Zeus r. In the refs hd l.
According to Hoover (2012) Handbook of Coins of Sicily.
Denomination C (16-18 mm, 3.02-6.69 g) struck early 3rd C BC.
This coin 2.64 g