crestline operator cover for casement window

A home owner from Indiana says:
The operator covers (for casement windows) I am looking to replace says "Crestline" over where the handles attach and they measure the same as your Product Code: 39-107 Truth hardware. Will this fit the same as the crestline one? Second could I use the Product Code: 39-107FK folding cover and handle in the place of the Crestline cover and handle? How would you know if Product Code: 39-107FK will attach properly to move the casement window operator? I have 10 windows I am trying to change to white but I want to make sure they would work before I order so I don't need to pay return shipping. Thanks
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Tom from SWISCO responded:
As long as the measurements and style are the same, the 39-107 should replace your existing covers. Don't worry about the brand name and focus just on those details. If they differ in any physical way, please let me know how and we can work from there.

The 39-107 and 39-107FK are interchangeable, yes. Assuming the 39-107 can work for your window, I see no reason why the 39-107FK wouldn't also work.
A home owner from Indiana says:
Here are some images that may help. Let me know if you still think the cover and handle will work for this crest line. Thanks
User submitted photos of a window operator.
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Dave Sr. from SWISCO responded:
Great, thank you! Yes, I think the 39-107FK can work for your operator. If you want further confirmation, check the operator arms for the word "Truth." That is the brand this hardware was specifically meant to work on. I'm confident that we have the right parts, this is just in case you wanted to be 100% sure.
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