HistoricalCoins item 192068. 

THESSALY. Rhodian Mercenaries. Ca 172-168 BC. AR Drachm 15mm, 2.65 g. Magistrate Hermias. 

Facing head of Helios.
Rose; Z-W flanking, ERMIAS above. 

Price, Larissa pg. 241; SNG Helsinki 795. 

Apparently an issue struck for Perseus during the Third Macedonian War as payment for mercenaries who required Rhodian 
coinage. Price suggested that the Zo... (instead of R-O) may be 
the patronym of Hermias, and we know of a Hermias, son of Zoilos 
at this period. Zoilos himself may also be the same man whose 
name appears beneath the bust of Perseus on early tetradrachms, 
and whose monogram continues to appear on Perseus' coinage for much of the period.

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From the CNG online Coin Shop, before May, 2004. By permission of CNG, www.cngcoins.com.