I have the balance out and but that's not the issue. What is the issue is the plastic clips on the upper corners of the window itself which keeps pressure on the balance. They are both broken as you can see in the attached photos. Do you sell these?
Paul from SWISCO responded:
November 21, 2016
It's tough to say what you have without seeing an undamaged version. That said, see our 18-166 and carefully look over our dimensions and pictures. Could this be a match?