Unknown roman coin?

Hi I would like to know what kind of coin I have here.

thank you in advance for any help. it looks very barbarian in design perhaps even a imitation coin to pass of as roman. 
 

Something like Sarmatian coins ?

I think it's Roman. The reverse looks like two victories holding a shield above an altar. The obverse helm while rarer than the standard diadem is possible on 4th century coins and I think I can see what used to be a mint mark at 6 o'clock on the reverse. Maybe something like: N#276526

This might make an interesting comparison:

https://www.coinarchives.com/a/lotviewer.php?LotID=2416071&AucID=5976&Lot=2956&Val=b2442dcdf48bc6ce7285f7ed41c212a1

Thank you @cro321, it looks very simular. However mine seems very crude in design. is that normal.

kind regards 

I really can't tell. robmax makes a great point about barbarian imitations of this type with his link. I can't read the obverse text from your photos, try reading it yourself. If the text fits it's the one I linked, if it's gibberish then it's the barbarian imitation robmax linked.