Marvin crank upgrade

A handy person from Colorado says:
We have quite a few Marvin windows and we'd like to replace them with folding handles. I have taken a few pictures, but have no idea of the model and didn't want to completely disassemble the hardware. Is it possible to tell from these pictures if the Truth Folding Handle and Cover kit (39-107FK) will be a match?
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
If you have Truth brand operators then the 39-107FK should fit, especially since you have center-oriented splines. Open your window and see if the "Truth" name is on the operator arm. That should tell you.
A home owner from COS says:
It is a Truth operating arm.

Thank you of your time.

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