A quick learner says:
January 12, 2015
These hinges are on custom made wood windows. I am having difficulty finding a replacement. Stmp is visible on photo
Dave from SWISCO responded:
January 14, 2015
Your hinge does not look familiar. We carry a 13" hinge for casement and awning windows, our 36-013-13, which is very popular. Take a look and see if that could work for you. If not, please send us some photos of how the hinge is installed onto the sash. Also, do you have a hinge that is not broken? That may help, as well.