Watch List notes:

Helena. As nobilissima femina, AD 306-324. Æ Follis (20mm, 3.12 g, 6h). Thessalonica mint. Struck under Constantine I, AD 318-319. HELE NA N F, mantled bust right / Star of eight rays within laurel wreath. RIC VII 51; LRBC 824. Choice EF, dark green patina, light smoothing. Rare.

Ex Classical Numismatic Group Electronic Auction 342 (14 January 2015), lot 756 (hammer $750).