as the bottom is broken off and still in the window sill. additionally I see both pivot bar 26-040 and a cast aluminum pin similar to 26-400 I dont see a pattern (all top sill are 040 or all 400) are 040 and 400 interchangeable?
the house is built in 2001 - but there are no branding on any of the windows. I have no idea of hte manufacturer. The first part of the comment above is concerning hte pictures. the window pins is a second question.