A quick learner from USA says:
Can you see what I need for this fix?
Can you take a look at this?
One picture is the left working window.
Other picture is on the left, missing a piece.
Thumbnail of the uploaded file named Operator 1.jpg
Thumbnail of the uploaded file named Operator 2.jpg
Profile picture of Julia
Julia from SWISCO responded:

Hello, thank you for writing in. You appear to have an older version of our ROTO casement operator. We carry the 39-091 and 39-092. Unfortunately we only have the base and not the link arm, which you appear to be missing in one of your photos. I apologize for the inconvenience.

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