roman coin [opgelost]

Hello

Can you please help me identify this coin?
Thank you

Looks like Constantius Gallus (351-354 CE) - Siscia mint. It should be 22mm and 5g.

Try Constans, RIC VIII - 110, Thessalonica MINT.

I've wanted to go to http://www.romancoin.info/
They had some great excel files , but it seems the site is down

Try Wildwinds, all you have to do is scroll down to Thessalonica and look for RIC VIII - 110.

Thank you Ninebobnote, it looks very similar, can you please tell me are you 100% sure it's that exact ric number?

It has 19 mm and 2.5 grams

You were right to ask for confirmation, the mintmark says it cant be 110 but is most likely 109 or 120 but then there are other reasons to say it cant be 120.
Without having it in hand I cant say 100% which one it is but with this information you should be able to figure it out.
The last letter of the mint mark would be helpful to narrow it down, is it Gamma (r) or Epsilon (E) or Beata (B) ?

Looks like a gamma to me.

Ok, I've managed to get the excel file for this type of coins.
I narrowed the search down to 4 different types:

Bust type
LROSDC laurel and rosette diadem, draped, cuirassed
PDC pearl-diadem, draped, cuirassed
ROSDC rosette-diadem, draped, cuirassed

And one difference by size
Size
22-23 mm
17-19 mm

My coin has 19 mm now, so it's the small type as this site also suggests http://www.forumancientcoins.com/monetaromana/corrisp/a442/a442.html
And It seems to be regular pearl-diadem coin
So in that case my coin is RIC 120