Nero 54-68 AD. Sestertius 32,3 mm Rome. 

NERO CLAVDIVS CAESAR AVG GER P M TR P IMP PP, Laureate head right, 
globe at point of bust, countermark on neck: X within incuse rectangle.
DECVRSIO SC, Nero riding right escorted by a soldier on horseback,
holding vexillum. 

RIC 172.

With permission of www.muenzen-ritter.com, August 2009