Caracalla AR Denarius, 18.5mm, 3.11 gr.

Obv: ANTONINVS PIVS AVG BRIT, laureate head right

Rev:  P M TR P XV COS III P P, Serapis, wearing modius, standing 
left, raising right hand and holding transverse sceptre in left, 2.4 gr

Sear 6829; RSC 195; RIC 194

Contributed by Cameron Day, www.cerberuscoins.com.