30841L

A quick learner from NJ says:
I've added pictures and approximate dimensions I believe it's the crank mentioned in your posts.
Thumbnail of the uploaded file named drawing of operator specs
Thumbnail of the uploaded file named split arm operator
Thumbnail of the uploaded file named split arm operator
Thumbnail of the uploaded file named split arm operator
Thumbnail of the uploaded file named worm gear
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Emily from SWISCO responded:

Hello there!

Our 39-035 comes to mind. This looks like the operator you're searching for but I recommend you review the specifications below to confirm everything lines up.

Let us know if you have any questions! 

Dimensions for 39-035
Dimensions for 39-035

A quick learner from NJ says:
Thanks Emily - Yes, those are the exact measurements. It doesn't have the circular attachment on the right hand side as yours does. Does that make a difference? I'm attaching a photo.
Thumbnail of the uploaded file named old style operator
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Emily from SWISCO responded:

No that doesn't make a difference. Our part is just an updated style of your older assembly. 

A quick learner from NJ says:
Hi Emily- I mistakenly assumed the second window had the same configuration.
I have enclosed pictures and dimensions of the crank in question.
I hope you can help.
Thanks,
Paul
Thumbnail of the uploaded file named dual arm operator
Thumbnail of the uploaded file named dual arm operator
Thumbnail of the uploaded file named operator base dims
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Emily from SWISCO responded:

Hi there Paul! Our 39-031 operator comes to mind but our dimensions differ from yours. We measure our part a little differently, however. Measure your hardware as shown below and see if the specifications match what you're searching for.  

Dimensions for 39-031
Dimensions for 39-031

Dimensions for 39-031
Dimensions for 39-031

A quick learner from NJ says:
Thank you, Emily- I threw the old crank out, but it looks like this one will do.
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Emily from SWISCO responded:

I'm happy to help! I'll be here if you need anything else. 

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