Image rights: wildwinds.com

Crispus AE Follis. AD 317. London.

Obv: FL IVL CRISPVS NOB CAES, laureate, cuirassed bust right.
Rev: SOLI INVIC-TO COMITI, Sol standing left, chlamys across 
left shoulder, holding globe, right hand raised.

S-P across fields.
Mintmark PLN. 

RIC VII London 114, rated R4