Nero, AE22 of Kallatis, Thrace. 

Obv: (from bottom right), NERO CAESAR AVGVSTVS, bare head right.
Rev: KAL/LATIA/NwN in three lines within wreath of grain-ears. 

RPC I 1802; Varbanov 245. 
Rare. 

With permission of Numismatik Lanz, Munich, from an
old auction. Added Sept. 2011.