Help with a roman coin [Resolvido]

this coin is small, only 14mm in diameter weighing 2.76 grams. I think it is Constantius II portrait on the obs with a pearl diademed, draped, cuirassed, and facing right. The pearl diademed has 3 tails (lack of knowing proper wording). On the rev it looks like a soldier with a spear stabbing an enemy on the ground. But I can not make out any ot the lettering.

Thank you for any help

Chris

Greetings, Chris.  Here are some of the closest matches I could find on Numista:

N#120285

N#50059

N#201482

N#27013

Thank you again Tony, I believe that the 2nd one is the one I have.