Do you know what goes around the window glass inside and outside? The windows were painted shut, and It is extremely difficult to remove the paint from the exterior stripping are the glass. I will prefer to replace it. I haven't removed it, fingers crossed that you have an example of all three types of stripping from this one window and you'll know exactly what it is. This 1/2" wide most likely original weatherstripping from a Truth casement window and it is installed in milled grooves around the 4 sides of the window frame.
What do you recommend as replacement stripping?