Watch List notes:

HELENA, first wife of Constantius I, (A.D.324-328/30), AE follis, issue of 326-8, Thessalonica mint (2.71 g), obv. diademed and draped bust to right, FL HELENA AVGVSTA, rev. SECVRITAS REIPVBLICE, Securitas standing to left, lowering branch, in exergue SMTSB, (S.16612, RIC 159B [R4]). Toned, extremely fine and very rare.

Ex Dr V.J.A.Flynn Collection and previously from Baldwin's London with their ticket.