Ancient Rome coin identification

Here are 2 coins to identify.

This one reads on the Obverse - GALLIEN V S AVG. The "E" in "GALLIEN"  looks like a "G".
Is it a ANTONINIEN GALLIEN? Doesn`t look the same as on Numista?


This one matches close to - CONSTANTIN 1 - Folis AE3
Obverse reads - CONSTAN TINVSAVG, but below the gate on reverse it reads - SMMB


Any help would be much appreciated!

Hi!

1- Gallien - Antoninien - ABVNDANTIA :
 http://www.acsearch.info/record.html?id=483412

2- You're right :
 http://www.acsearch.info/record.html?id=223015

SMNB is for : SMN = Nicomedia mint ; B = second officine

Thanks! are these coins on Numista?
Should I add it?

1st : http://en.umista.com/catalogue/pieces40300.html
2nd : to add, see with Tetricus