20mm  3.6 grams  Follis  of  CONSTANTINE 1 AVG.  307-337  
Obv; IMP CONSTANTINVS AG. Laur Cuir Right   
REV;  SOLI INVICTO COMITI,  Sol  radiate standingleft, holding globe in left hand, raised right hand. 
 Year 316.  MSL S/P  Mint of LONDON   RIC VII; 70 {R4}  LMCC 8.07.012 {S}