Watch List notes:

Constantine I. AD 307/310-337. Æ Follis (21mm, 4.56 g, 6h). Rome mint, 1st officina. Struck AD 312-313. Laureate and cuirassed bust right / S P Q R OPTIMO PRINCIPI, aquila between two signa; RP. RIC VI 349a. Dark brown surfaces. Near EF.