Roman coin identification 9 [solved]

Can someone help in identifying this coin or any text in it? Or emperor?

it has around 2.3gr and around 17 diameter.

The reverse is this design: https://en.numista.com/catalogue/index.php?e=rome&r=SPES+REIPVBLICE&st=1-2&cat=y&im1=&im2=&ru=&ie=&ca=3&no=&v=&a=&dg=&i=&b=&m=&f=&t=&t2=&w=&mt=&u=&g=&c=&wi=&sw=

The name of the emperor is missing. Except the last letter (S), which is not very helpful. But it's probably Constantius II. or Julianus II.

thanks