I've been struggling with attributing Constantinian Era Coins, especially with identifying the emperor, because the obverse legends are all so similar! I'd really appreciate if someone could confirm, add, or revise my attributions.
Obverse: Looks like FL IVL CONSTANTIVS NOB C
Reverse: GLORIA EXERCITVS; two soldiers standing on either side of two standards, with a dot in-between the two standards.
Mintmark: SMT? (I'm not sure with the last two figures)
Obverse: DN CONSTANTIVS PF AVG (what kind of headgear is he wearing?)
Reverse: FEL TEMP REPARATIO; Soldier spearing fallen horseman (with a random letter M on top of the fallen horseman? Is that a mintmark?)