BB16847. Billon denarius, RIC IV 91, Cohen IV 364, Choice VF, illegal mint, weight 3.300g, maximum diameter 20.5mm, die axis 180
o, after 229 A.D.; obverse IMP SEV ALEXAND AVG, laureate head right; reverse P M TR P VIII COS III P P, Mars standing right, resting left on shield, and reversed spear in right;
full circle centering;
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