Identifying Casement Operator

A quick learner from Southern California says:

Could you tell me what replacement part this might be in your inventory AND what crank handles would property fit this mechanism?

Also, do you have any videos or info on how to best replace these without totally destrying a window casement?

I think this is the correct mechanism, but not sure about the cranks as the the cranks that show as being related items seemed to have a different spline pattern in the video that showed.

https://www.swisco.com/Caradco-Window-Crank-9-1_2-inch/pd/Casement-Window-Replacement-Operators/39-028Thank you

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Bob from SWISCO responded:

Thanks for posting. We can't say for sure what operator you need without seeing a picture of it in its entirety, including the link arm. If the appearance and dimensions match our 39-028, the 39-114L or 39-205 crank handles would work with this operator. If you are uncertain this is the right operator, please show us a picture of your entire operator from a bird's eye view, and please provide dimensions of the straight arm. For information on how to remove and replace these operators, see the video below. Many thanks.

A quick learner from Southern California says:
Here is FULL shot of the mechanism taken beside a tape measure, but there are different sized windows with this same mechanism, but different sized arms and I assume the crank would be the same for all of them - right (the splines all look the same)
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Dave Sr. from SWISCO responded:

Thanks for your reply. Reviewing all of your photos and information, I do agree with Bob in recommending the 39-028 operator. The handle you have now should fit the new operator as long as it has the same 11/32" diameter spline. Give it another look, along with the video Bob placed in his reply and let us know if any other questions come up. 

A quick learner from Southern California says:
To be clear, I am not looking for the mechanism, I am looking for the CORRECT HANDLES for this mechanism - the current handles someone put on the mechanisms do not fit properly.

Can you provide HANDLE model numbers that you think should fit?
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Dave Sr. from SWISCO responded:

Got it. Take a look at our 39-114L crank handle, as well as, the fold down version, our 39-205. See if any one of these handles can work on your operator. 

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