As Antoninus Pius - head left
ANTONINUS PIUS. 138-161 AD. Æ As. Struck circa 141-143 AD.
Obv. ANTONINVS AVG PIVS PP Laureate head right
Rev. TR POT COS III SC Roma seated right holding spear, head propped on left hand.
RIC 696v (head right); Cohen 893v (id.)
All Antoninus Pius middle bronzes with portrait to left are rare; however, nothing proves a dedicated use such as special issues.
InAsta auction 04 Mar 08, lot 459.