Lauren from SWISCO responded:
April 12, 2023
Hello, thank you for posting, Please start by reviewing the style and dimensions of the 39-175 Pella crank operator to see how it compares to your original. This operator is compatible with the 39-109B handle. Unfortunately the cover to this operator has been discontinued and no longer available. Please review and let us know if you have any additional questions. Dimensions for 39-175
View of the arm of the 39-175 window operator.
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