Need help identifying hinge

I've got a window that doesn't close all the way. (This is a photo of the hinge on a working window.) The bottom part of the hinge on the window that doesn't shut operates a little differently than ones on working windows. That black part with 2 screws in it looks stripped and it moves slightly along that track while opening and closing the window. On the windows that work that black part doesn't move at all. There is a number (31272) stamped on the bottom part of that hinge.

Based on what I'm able to observe from the working windows that part is faulty and needs to be replaced. I suspect that the entire hinge needs to be replaced. Any help you can provide would be appreciated.