Antoninianus Pius as Caesar, AR Denarius 138 AD as Caesar 
under Hadrian. 

Obv: IMP T AEL CAES ANTONINVS, bare head right. 
Rev: TRIB POT COS, Concordia standing left, holding patera 
and cornucopiae, resting left elbow on column.

RIC 449 (hadrian); RSC 1060 Sear 4135.

With permission of TimeLine Auctions (www.timelineauctions.com), Sep, 2013

Note: I have yet to see a RIC 450 (as described in RIC) which shows Concordia as on this coin but without the column.
Every coin I have found online is a RIC 449, wrongly
 described as a RIC 450. 
If Concordia is leaning on a column, it's RIC 449, if
she isn't, it's RIC 450.
The way to tell the difference between the column and
her drapery is, if it reaches to the ground, it's a column.
I would be happy to add a RIC 450 if anyone has one in his
or her collection. D.