Watch List notes:

HELENA. Mother of Constantine the Great. AD 307-337. AE follis. EX ANS/HUNTINGTON. (19mm, 3.34g). Treveri (Trier) mint. Struck under Constantine I, AD 325-326.
FL HELENA AVGVSTA. Diademed and mantled bust right, wearing necklace / SECVRITAS REIPVBLICE. Securitas standing facing, head left, holding olive branch and lifting dress. RIC VII 465. Ex Huntington. Ex American Numismatic Society #1001.1.27986. VF.

Estimate: $75