Ancient Roman/Greek coins I'd love your help IDing

I checked the Forvm site, but did not have much conclusive luck. Thanks all!
[spec 3,4,5]

 

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Claudius (looks like a sestertius)
Constantine
Constantius II

 

Thanks! here is the reverse of the 3rd coin. pretty ugly I know.

 

http://www.wildwinds.com/

try this site its a good online reference

 

Thanks. i think the 3rd coin is this...
Ancient Rome. Constantius II, 337-361 AD. Bronze follis struck 333-335 AD. His laureate, draped, cuirassed bust right, FL IVL CONSTANTIVS NOB C / Two soldiers holding spears and shields with two Legionary standards between them, GLORIA EXERCITVS