134-138 AD., Hadrian, Rome mint, Dupondius, RIC 850a.

Hadrian, Rome mint, 134-138 AD.,
Æ Dupondius (25-27 mm / 12,83 g),
Obv.: HADRIANVS - AVG COS III PP , laureate head right.
Rev.: DACIA / S - C , Dacia seated left on rocks, holding standard topped by legionary eagle and curved sword, r. foot rests on helmet.
RIC II, 447, 850a (scarce) ; Coh. 531 .

Curtis Clay 21/6/2010:
"Judging from the illustrations in BMC, Strack, and CoinArchivesPro: When you can see the end of the standard, it's usually topped by a legionary eagle, so I think that is the intended type: Dacia holding standard topped by legionary eagle.
I agree that the object under her foot is likely to be a helmet rather than a globe. It ssems to be omitted quite often.2