FEL TEMP id?

[Jan]

This Constantius II coin has a letter in the left field on the reverse. It looks like an N to me and then this ought to be either Thessalonica 208b or Sirmium 71a. However, the coin is only 14 mm, while the two coin types should be 17-19 mm according to Helvetica's FEL TEMP excel file.

Obverse: DN CONSTAN-(TIVS PF AVG)
Reverse: FEL TEMP-(REPARATIO), left field N or M, exergue not readable

If the letter instead is an M, then Alexandria 84 or Arles 269 are the only ones with a diameter of 15 mm or smaller.

I would be very happy to hear your opinion about this. Can the coin be identified based on style?

Best wishes,
Jan

[Johnny]

I think the letter in the right field is an  M

Arles 269 has a diameter of 13-15 mm  with an M  in the right field

[Jan]

Thank you Johnny, it is probably an Arles 269. The M/N fooled me a bit. I will try to find another Arles 269 to convince myself completely.

Best wishes,
Jan

[SC]

Could also be a barbaric, especially with that odd jaw-line.  Can't see enough of lettering to see the style.

Shawn