103-111 AD., Trajan, Rome mint, Sestertius, RIC 534 var.

Trajan, Rome mint, 103-111 AD.,
Sestertius (ø 33-34 mm / 23,04 g), brass ("orichalcum"), axes coin alignment ↑↓ (ca. 180°),
Obv.: IMP CAES NERVAE TRAIANO AVG GER DAC P M TR [P COS V P P] , his laureate bust right, aegis on left shoulder; unusual portrait.
Rev.: S P Q R OPTIMO PRINCIPI / S C , emperor, in military attire, on horse prancing r., brandishing spear in his raised r. hand against fallen Dacian kneeling r. below the forelegs of the horse, head turned l., both arms raised in terror.
RIC II, p. 282, no. 534 var. (drapery on l. shoulder) ; Coh. 503 var. (same) ; BMC 176, 833 ; Strack 361 ; CBN 559 var. (same) .

for the obverse die see http://www.acsearch.info/search.html?id=288725 (Numismatica Ars Classica NAC AG, Auction Q , lot 1797 , 6. April 2006, RIC 527 reverse)