operator casement window

A quick learner says:
I can not find a window manufacture on the window - the travel guide on the bottom of the window sash is pictured the arm appears to insert in the black guide - I can't figure out how it is retained or if there is a piece missing or where to find parts
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Casey from SWISCO responded:

Hello,

Take a look at the video below to identify a replacement for your operator and the related items that work with it. Thank you!

How to Orient a Dual-Arm Operator
How to Orient a Dual-Arm Operator
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Comparing the 39-253LB & 39-438B Operators
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Anatomy of a casement window
Anatomy of a casement window
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How to Replace a 2-Bar Hinge Set on a Casement Window
How to Replace a 2-Bar Hinge Set on a Casement Window
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How to identify casement and awning operators
How to identify casement and awning operators
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