Trajan, AE contorniate. AE40, 19.62 g. Rome.

TRAIANVS AVG COS.., laureate head right.
Hercules standing left, grasping the horn and jaws of 
the Cretan bull running left.

Alföldi, Die Kontorniat-Medaillons I (1976), 282.

With permission of Dr. Busso Peus Nachfolger, Nov. 2012.
Very rare.
Estimate: 600 Euros.