This coin is not in RIC with the H4 bust, it should come before Rome 187.
Bidding got serious, it sold for $408.80.
Constantine I
A.D. 318- 319
19mm 3.1gm
CO-NSTANTIN-VS AVG; helmeted and cuirassed bust left, spear pointing forward, shield on left arm.
VIRTV-S AVGG; campgate with four turrets, in fields P/R
In ex. RS
RIC VII Rome --