Antoninus Pius. AE40 medallion. Rome. AD 150-151. 43.73 gr, 39.58mm. 

IMP CAES T AEL HADR ANTONINVS AVG PIVS PP, laureate head right, with aegis.
TR POT XIIII COS IIII, Jupiter, bare to waist, seated 
facing, looking left, holding thunderbolt and sceptre 
between the Dioscuri, standing right and left at his sides, 
one holding a parazonium, the other holding a sceptre, the 
scene placed on a river bank supported on the hands of the 
river-god Tiber, shown as his upper body only, below.

TLA internal item no. 39972
Apparently unpublished. Not in Gnecchi, Mionnet, BMC, RIC,
Cohen, etc. Same obv. die as Gnecchi 38. Rev. type slightly 
similar to Commodus, Gnecchi 74, but that coin has horses
behind the Dioscuri, an eagle on the base of the throne and 
no river god.

With exclusive permission of TimeLine Auctions (www.timelineauctions.com), Nov, 2014