This window is new and in overall good condition, but the hinge is bent in two locations and separating from the frame due to some missing rivets. See photos. You may consider using the hinge from your original sash, or straighten the hinge that comes on this window. 

This is the front flat glass and sash for 1975-1980 Airstream trailers. This glass is clear (not tinted).

The frame measures approximately 43-3/8" x 23-1/2". Including the hinge, it is approximately 43-3/8" x 23-3/4".