Roman Imperial
Trajan (98-117) AR Denarius (Silver, 3.16g, 20mm) Rome, 101-102.
Obv: IMP CAES NERVA TRAIAN AVG GERM, laureate bust right
Rev: P M TR P COS IIII P P, Mars advancing right, holding spear and trophy.
Ref: RIC 52
Certificate of provenance and authenticity included . 
Provenance : Numismatik Naumann