Tranquillina, AE26 of Calchedon, Bithynia.

Diademed, draped bust right.
Apollo reclining right, resting hand on head, holding lyre, 
on back of swan flying left. 

RecGen 115; SNG Copenhagen 368.

From the D. Alighieri Collection.
Sale 199, Lot: 318. Estimate $100.
Sold for $645.
Used with permission of CNG (cngcoins.com), July, 2011