Roman coins - Constantine, Constans and Arcadius?

Hello,
Quick question—I haven’t measured these yet—can anyone help me identify them? I couldn’t make out some of the letterings...

#1:


• VOT X - Constantine? (Couldn’t find the X one on Wildwinds so might be some other emperor)

#2:


• Constans? (I don’t remember what this type was called)

#3:


• SALVS REIPUBLICAE - Arcadius?

Hello,

#1
Its Constantine II (you can tell it's not his father by the portrait and the NOB or IVL in the legend), but I can't read the mintmark...
Obverse : CONSTANTINVS IVL NOB C

#2
It is indeed Constans (D N CONSTA-NS P F AVG). Reverse type is GLORIA EXERCITVS. The mintmark seems to be
SMKA or SMKB (Kyzikos). RIC 18 or 33, not sure.

#3
Indeed, Arcadius. You got the right reverse type. There is a chi-rho in the left field. The mint can be Alexandria, Antioch, Alexandria, Aquileia, Constantinople or Nicomedia.

Hmm, I think I see --SΓ so #3 is Constantinople mint, maybe? I see PT (Ticinum?) on #1 but a couple letters follow it and I'm not sure what these are (maybe I should get a magnifying glass or something)... Anyway, thank you so much!

Yes, a magnifying glass would be a great help
I found with mint marks that if you go away for a time then come back to them (and squint a bit...) you see something totally different. The Arcadius coin shouldn't be Constantinople because the Victory has wings. If you can see S*** it could be Antioch or Alexandria (SMAN** or SMAL**) or perhaps Cyzicus (SMK) depending on which way the Victory is looking, left or right.