Unknown Roman coin for identification.

Hello all! 

I have this coin you can see on this pics:

I can read only the"IMP……DIOCLETIANUS". The mint starts with a T and ends with an S. Can sombody identify this coin? maybe the mint too? 

Thank you for your help! 

Villimos 

I forget about the diameter of the coin: it is 27mm

 Maybe: Follis - Galerius GENIO POPVLI ROMANI; Thessalonica 

N#60003  

 Found by putting those two pictures in image search. 

 P.S. Just for the mint really, though reverse the same. 

Different obverse. 

 Similar both sides, though bronze, and no diameter: 

N#7717 

IMP C C VAL DIOCLETIANVS P F AVG 

GENIO POPVLI ROMANI 
Δ 
T S 

There's a website called Tesorillo. It's an identifier for roman coins.  It's very detailed and easy to navigate.  It's a follis

Rickthetreasurehunter

There's a website called Tesorillo. It's an identifier for roman coins.  It's very detailed and easy to navigate.  It's a follis

Thank you!