Casements Window Crank Operator Replacement

A quick learner from Rye, New York says:
I am looking for a right hand split arm operator for vinyl casement Window installed in the early 1990s. Please see attached photos of the part installed.
User submitted photos of a window operator.
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Tom from SWISCO responded:
We appreciate your inquiry. Take a look at our 39-171 and 39-172. Please compare the size of your link arm to the dimensions we show. You may want to remove your operator from the window to make sure your measurements are as accurate possible. Let us know if you need any further help.
A quick learner from Rye, New York says:
Thanks for your response. Do you believe I can use the existing stud bracket with the stud facing down?
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Tom from SWISCO responded:
Sure! As long as it's in good condition I see no reason why you can't reuse it. Just take note of the orientation of the detach clip. On the two operators I recommended, the detach clip is on top of the link arm. I can't quite make yours out, but it looks like it might just be on the bottom. Fortunately, if it does have to be on the bottom, you can just pop them off and flip them around.
Connecting a casement window operator to stud bracket
Connecting a casement window operator to stud bracket
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Anatomy of a casement window
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