The left one may be based on Nero RIC 97
Nero. Sestertius, Rome mint, 63 AD.
NERO CLAVDIVS CAESAR AVG GERM PM TR P IMP PP, laureate head left
ADLOCVT COH beneath Nero, bare-headed and togate,
standing left with praetorian prefect (also bare-headed and togate) on low
platform on right, raising right hand in address to three soldiers standing
right in single file, of whom two foremost carry standards; in the background,
pillared building below battlemented crescent-shaped structure. http://www.wildwinds.com/coins/ric/nero/t.html
The right one may be based on Marcus Aurelius RIC 378
Marcus Aurelius AR Denarius 176-177 AD.
M ANTONINVS AVG GERM SARM, laureate head right
TR P XXXI IMP VIII COS III P P, Victory advancing left holding wreath & palmhttp://www.wildwinds.com/coins/ric/marcus_aurelius/t.html