Need new operators

A quick learner from DeForest, WI says:
I have KK casement Windows. Two operators are not working (one for a left window and one for a right window). The words on the mechanism sat Entry Gard Truth. 20810.
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Tom from SWISCO responded:

I recommend looking at our 39-031 and 39-032 to start out. Carefully compare our dimensions to yours to confirm that everything lines up, or let me know if they don't.

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