Awning Operator Help

A quick learner from Louisville, OH says:
My window is inscribed with - 1 Window
10-69.

There is nothing else on the glass or the hardware. I need to replace an opening handle like the one pictured above. The arms that open the window are 12" long. It is an awning style window, and the visible glass measures 35-3/8"W X 21-1/4 H. I was told this is an Andersen window, but I do not believe that is true.
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Bob from SWISCO responded:

This operator looks unusual to my eye. The body resembles the lever lock style of our 39-070, yet the operator arms themselves are much more like the 39-348. Take a look at the dimensions on the 39-348 page. Do they match up? Let me know if they do or not. I am not certain if this operator could work for you without some modifications to the window sill, but this may be our best bet for you. 

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Dave Sr. from SWISCO responded:

Thought I'd jump in here and add to Bob's thoughts. I also couldn't locate this older style Truth Operator. Now, I personally believe you could use the 39-070 with two of the 39-170 sash bracket. Bob's right that the 39-348 might also work for you, but the issue is that you would need to adapt your wood sill cover to accommodate the different body. The 39-070 might be a better fit, but you would have to compare and see. 

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