Populonia, Etruria. AE 25 Centesimae - Quadrans, after 211 BC. 11.93 g.

Helmeted head of Minerva right, XXV before; all in a circle of dots surrounded by a wreath.
Incuse dolphin left, between two smaller incuse fish, all on a raised circle; waves around. 

Vecchi, "The Coinage of the Rasna. A Study in Etruscan Numismatics. Part IV," in SNR 72 (1993), 31/1 (O14/R29 - this coin). 

Extremely rare, only this specimen cited by Vecchi!
Ex Spink Auction 82 (27 March 1991), lot 431.

This unique coin is part of a series and shares the same obverse die as the other 25-unit with a rooster reverse type. 

Triton V Sale, 15 Jan 2002, lot 4.
 
 Lot sold for USD 4500.

Used by permission of CNG, www.historicalcoins.com