Casement window crank and bracket

A quick learner from Grosse Pointe Park says:
Looking for a Pella crank and window arm/ bracket for a Pella casement window. The only visible markings are WL. My crank latch doesn't seem to be closing the window all the way and I don't see any adjustment screws.
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Lauren from SWISCO responded:

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
Dimensions for 39-175

View of the arm of the 39-175 window operator.
View of the arm of the 39-175 window operator.

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