Window Handle Replacement Needed

A home owner from 30067 says:
I purchased this handle and it matches the window however it is just a little bit too small of an opening to fit cleanly over that threaded knob. You have to jam it on and even then will only go a little bit and not enough to use the tightening screw. I need an identical handle with a slightly larger opening to except the threaded knob. Help?
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A home owner from 30067 says:
What I purchased was part 39-107FK
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Bob from SWISCO responded:

Sorry to hear the 39-107FK didn't work for you. You can view our Return Policy here . One issue to my eye is that the spline on your operator does not appear 'centered' on the base, which is needed for the 39-107FK type cover and handle. Can you show me a picture of your entire mechanism, including the link arm(s)? We'll do our best to find what you need from there. Thanks. 

A home owner from 30067 says:
I am not sure what you mean by spine operator or link arm. I have tried every way to get the handle to fit onto that threaded knob but it's just too tight to go all the way down and fitted.
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Bob from SWISCO responded:

What I mean is I don't believe the 39-107FK is compatible with your old operator. The 39-107FK is meant for an operator where that spline, the spindle that the handle fits over, is perfectly centered on the base. It certainly doesn't seem to be in your photos. I need you to open the window and show me the entire operator assembly; by link arm(s), I mean the arms that jut out of the back of the operator base and push and pull the window sash. If I can identify the operator your window uses, I should be able to tell you a better cover and handle option. 

A home owner from 30067 says:
Gotcha. I will say it's a perfect match fit wise on the crank, just not for the threaded opening. There is no brand listed anywhere.
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Dave Sr. from SWISCO responded:

Maybe I can help. I am afraid your exact operator is that is not available. We carry very similar operators--see our 39-031 & 39-031 , or our 39-155 & 39-156 --but the operator base is bigger. You'd have to see if you could somehow adapt your sill to use this size operator. I can't guarantee you could, but it's our best option. Note that these would work with the 39-107FK . I apologize we can't be of more help, and best of luck with the repair. 

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