Lauren from SWISCO responded:
February 21, 2024
Hello, thank you for posting, I agree that your original operator resembles the 39-020 style. As long as the dimensions below match up, this style should be a good fit for your window. I would also recommend removing the arm from the track to confirm the end of the arm matches as well. Unfortunately the arms are not sold separately. Please review and let us know if you have any additional questions. Dimensions for 39-020
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