Trajan AV aureus. Rome. Struck AD 103-111. 7.26 g. 

IMP CAES NERVA TRAIAN AVG GERM, laureate head right with 
aegis on left shoulder.
DACICVS COS V P P, Trajan in slow quadriga l, holding laurel branch and sceptre. 

Woytek 149c (this coin); RIC II 77 var (no aegis); BMCRE 142 var (ditto); Calicó 1020 (this coin). Biaggi 485 (ditto).

Extremely rare.

With permission of Numismatica Ars Classica, auction 49, Lot 186, Oct. 2008.