Roman or Greek Coin? [解決]

Hi, can anyone identify the coins and any information you may know about the symbols.  I’ve looked but have been unable to get information on the second coin (larger).       Much appreciated.  

First coin is a late roman nummus. Constantius II, reverse GLORIA EXERCITVS with two soldiers. Mintmark looks unreadable to me.

Second coin is N#426988 . Yours is the variant at the first year line.

Thank you.  

The first coin has the lettering CONSTANTIVS NOB C at the end. I think the mintmark of the first Roman coin is Arelate, i read SCONST on your coin.. N#475081