Replace dual-arm window operator

Hi, Thomas.

Thank you for reaching out to us. We sell several operators that have this exact base so I'll need more information to help narrow down some options. Can you show us a photo of your operator with the window open so that the arms that move the sash are fully visible? 

Is there an identical window in the house with a working version of this operator? If so, we can use that as a reference. You can see our section of Casement Window Replacement Operators here in the meantime.