A beginners Constantine

Hi all,
I’m a beginner trying to identify some coins I’ve removed from what was basically a block of concrete (hoping I haven’t destroyed them in the process) and I have a Constantine but that’s all I can identify as it’s a bit (very) rough on the reverse. Hoping someone can help me with some info.

If I'm not mistaken it's Constantine II AE follis. CONSTANTINVS IVN NOB C, laureate, cuirassed bust right / GLORIA EXERCITVS, two soldiers holding spears and shields, two standards between them. I can't read the mint mark. You can find Constantine II's coins here: http://www.wildwinds.com/coins/ric/constantine_II/t.html

Wow, thank you so much!! That is a lot more information than I’d expected. Cheers