Roman coin identification [解決]

Hello, I just got a small lot of Roman coins and now want to identify them.

The first one (from left to right) is most likely a Nummus of Constans, I just cant identify the mintmark.
But I got no Idea for the other 2 ones. The weight of the coins is 1. 1,4g 2. 2g 3.1,6g
Ty for any help

sharper and bigger pictures would help.
try this:
http://www.wildwinds.com/coins/ric/i.html

Hello,

I guess the first one is a VICTORIAE DD AVGG Q NN reverse type with two victories standing, facing each other and holding wreath.
The legend on the observe seems to start with "DN CONST..." for Constans (If the legend doesn't match, it could be Constantius II), in this case your coin was probably minted at Trier, Arles or Aquileia.

The one in the middle is a SECVRITAS REIPVBLICAE reverse type with one victory standing left and holding wreath.
We can see some symbols in the left field who can help to identify the mint : maybe a moon at the bottom and a star (Aquileia?)
The observe legend is GRATIANVS PF AVG for Gratian.

The last one is Claudius II. Maybe Iovi Statori.

Ty for your help. So I think the coins are the following:
1. https://en.numista.com/catalogue/pieces57350.html
2. https://en.numista.com/catalogue/pieces62605.html (I didnt find the exact mintmarks on the numista list)
3. Maybe something like this one? https://en.numista.com/catalogue/pieces79386.html

More like this one :
https://fr.numista.com/catalogue/pieces60111.html

We see a O in the reverse legend, and regarding the character only Iovi (Jupiter) seems to fit. It's more likely to be Iovi Victori (first link) than Iovi Statori ( https://fr.numista.com/catalogue/pieces41080.html ).