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Tom from SWISCO responded:
February 22, 2022
I believe that would be the 39-329, but the best way to confirm that is to compare the photos we show on its store page to your original operator. Note the orientation of the arm and spline. As long as those are in the same position then you should be good to go. I know that's not the most confident answer in the world, but please understand that I've seen some windows with wild configurations. Your left-side hinge may not be the same as the left-side hinges I've seen during my career. You never can tell. That's why we have photos for each product, so that you may se them as a reference and confirm beyond any shadow of a doubt. |
