Will the 39-107FK fit my window?

Quick Learner from Hilton, NY
Please see the attached pictures. The measure are 4.25? right side to stem / 1.25? left side to stem.
Thanks
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Bob
Bob from SWISCO
SWISCO
Expert

This looks possibly more like the 39-376 to me, because the spline is offset to the left. But please show me the entire operator, including the link arm(s), to confirm. Many thanks. 

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