Help with this girl...?

So I took this hen from someone local here that was downsizing her flocks about a year ago. She didn't say anything to me about breed or history on her - I know they were well taken care of and I was in a hurry when picking her up along with a couple others that day.

I think she looks "black copper maran-ish" but prob not full...there's some differences/discrepancies. Thoughts as to what she is? She lays what I'd consider a med/large, average brown egg.

 

I didn't even think about that!! Lol probably because I didn't know much about black sex links to begin with Definitely looks like one now that I've looked it up...thank you!

 

Thank you both