ID for LRB with unknown reverse

[igor_coins]

Greetings to all!

I need help with identification of the coin below from a bunch of uncleaneds.
On the obverse is a portrait of (probably) a ruler from the Constantinian dynasty, I can read "SPFAVG", so maybe this is Constans?

But the reverse is so worn, I can't even guess its type, even what side is up, so I attached two images of the reverse mirrored vertically.
Could somebody with more experience recognize it?

Igor.

[mwilson603]

HI Igor,
Maybe something like this below from www.wildwinds.com.  Of course I am just taking a wild guess at the size, and the mint, but definitely Victory!
Constans AE17. Siscia mint. CONSTAN-S PF AVG, rosette-diademed, draped, cuirassed bust right / VICTOR-IA AVGG, Victory advancing left, holding wreath and palm branch. Left field: Chi-Rho. Mintmark: star ASIS star. RIC VIII Siscia 177.
regards
Mark

[igor_coins]

Thank you, Mark, indeed it looks like Victory!

Although now, after looking through the coins with single Victory on reverse, I see that the obverse legend ending on "S PF AVG" belongs not only to Constans but also to Valens (with SECVRITAS-REIPVBLICAE reverse, as the example below from Wildwinds), and coins of the latter emperor are more abundant on Wildwinds actually.
Being rather inexperienced I'm not yet able to tell Constans from Valens by the portrait, I wonder if this is possible..?

P.S. The diameter of my coin is 15 mm.
With best regards,

Igor.

[mwilson603]

Aually, that is a good call.  Looking closer it is more likely to be Valens as I believe this bust is Pearl diademed, and as far as I can see Constans didn't have any minted with Pearl diadem, so yes probably Valens.  Which mint it is is going to be difficult unless you can make out any letters in the exergue, or maybe a symbol from the left/right field?
regards
Mark
P.S. The best resource I know for identifying these types of coins can be found in the excel sheets devised by Dane.  You can find these under http://www.catbikes.ch/coinstuff/coins-ric.htm