Here is my next $10 nyinc that I believe to be authentic. It is my first Helmet coin!
Constantine I, RIC VII 48
Constantine I AE3. IMP CONSTANTINVS AVG, laureate, helmeted & cuirased bust right / VICTORIAE LAETAE PRINC PERP, two Victories standing facing one another, together holding shield inscribed VOT/PR on altar, GSIS star in ex.
2.43 gr., 18mm
NOT magnetic
The wildwinds example show the coin as 3.06 grams but I think that is ok?

