Caracalla, Rome mint,
Denarius (19-20 mm / 3.53 g), 208 AD.,
Obv.: ANTONINVS - PIVS AVG , laureate head of Caracalla right.
Rev.: PONTIF TR P XI - COS III / PROF in ex., the emperor in military attire, holding spear, on horseback right, foe / enemy right before.
RIC Vol. IV, part I, page 228, no. 108 ; C 511 ; BMC 574 .
The coin refers to the departure of Caracalla, Septimius, and Geta on their British expedition 208 AD.
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