Knob for sunroom window does not work

A home owner from Snyder, NY says:
October 12, 2015
One of our sunroom windows no longer closes. We had it so it was permanently shut, but it was accidentally reopened and now does not close. Hoping to just replace that knob. Unfortunately we don't have any information on the brand of the window.

According to a local window distributor, our sunroom windows are very good quality so we don't want to replace them.

I have attached multiple photos as reference. If the replacement part is available, we will be able to install it.

Thanks for your help!
User submitted photo of their window hardware.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
October 13, 2015
Thanks for posting. Please give me the distance between the installation holes, if you can. We would also like to see it removed from the window that so that we can get a good look at the internal gear and link arm. This information will allow us to find a good match. Also take a look at our video below, that may help.
A home owner from Snyder, NY says:
October 17, 2015
Thanks, Dave. I have attached more photos for your reference.

The holes are 1/2 an inch apart across and 5 1/4 length wise.

User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
October 21, 2015
Look at our 39-074 operator and check the spacing of the holes at the bottom. See if yours matches up to the 13/16" on the 39-074. Also check the other dimensions we show with your operator to confirm that its a match.
A home owner from Snyder, NY says:
October 25, 2015
Thank you! We have put in a request to be notified when the piece becomes available.
Lenahan Window Crank
Lenahan Window Crank
39-074
$20.45
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