Rhodes, Caria, AR tetradrachm, ca 360 BC. 15.20 g. 

Head of Helios, head turned slightly right.
RODION, rose with bud to right, head of gorgoneion facing in lower left field, A in right field. 

Hurter, "42 Tetradrachmen von Klazomenai" in SNR 47 (1966), pl. vii, O (this coin). Otherwise unpublished.

Unique with this symbol! 
Ex Bank Leu Auktion 30, lot 185, April 1982 and Triton V, lot 1452, Jan 2002.
 
Lot sold for $13,000, plus buyers fees.
By permission of CNG, www.cngcoins.com.