AE3 of London, struck c.A.D.317.
Obverse: CONSTANTINVS IVN N C. Laureate, draped and cuirassed bust of Constantine II facing right, viewed from the rear.
Reverse: SOLI INVICTO COMITI. Sol, radiate, chlamys across left shoulder, standing facing left, his right hand raised and holding globe in his left. In left field, S; in right field, P; in exergue, PLN.
RIC VII : 118.