103-111 AD., Trajan, Rome mint, As, RIC 543 var.

Trajan, Rome mint, 103-111 AD.,
As (25,5-27 mm / 10,67 g), copper, axes coin alignment ↑↓ (ca. 180°),
Obv.: IMP CAES NERVAE TRAIANO AVG GER DAC P M TR P COS V P P , laureate head of Trajan facing right, wearing aegis.
Rev.: S P Q R OPTIMO PRINCIPI / S C , Trajan in military dress on horseback r., holding rein with l. hand and brandishing spear with r. hand, riding down fallen Dacian on knees looking back at emperor.
RIC cf. 543 ; Coh. 509 var. ; BMC 942 var. (Curtis Clay: unillustrated, is also an As with enemy before (not under) horse and aegis on portrait)
unpublished variant with aegis ?