Truth 30744 window crank

A quick learner from MN says:
Part number on the arm is 30744. What window crank will work.
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Bob from SWISCO responded:

Hello there. I am afraid that number appears on a few different operators; it's not an identifier. The only reliable way to determine what operator you need is to send us a picture of the old assembly in its entirety. A bird's eye view, with the window open and the mechanism and link arm(s) in full view, would be best. We'll do our best to ID what you need from there. 

A quick learner from MN says:
I attached the photos. What model window crank would I need?
Thumbnail of the uploaded file named IMG_2372.jpeg
Thumbnail of the uploaded file named IMG_2373.jpeg
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Bob from SWISCO responded:

Thanks! This operator is similar in design to our 39-023. I think this may be a good option but I'm not certain how well the arm length compares. Look it over and see what you think.

Please also note that this is only available in black and white. The handle is also sold separately under our 39-114L.

Dimensions for 39-023
Dimensions for 39-023

Detail view of 39-023
Detail view of 39-023

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