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Antoninus Pius AD 138-161 AR denarius 2.63g 

ANTONINVS AVG PIVS PP TR P XVII, laureate head right. 
COS IIII - Salus standing left, feeding serpent rising from 
altar and holding rudder on a globe. 

Rome mint: AD 153-154 = RIC III, Unlisted. This rev. legend is listed RIC 229a to 233, Salus is not listed.