Can you ID this Jeld-Wen operator for me?

Hello, thank you for posting,

I cannot fully confirm with the screen installed, but please start by reviewing the style and dimensions of the 39-239B operator. Compare the overall measurements to your original to see how they match up. This operator uses the 39-536 pivot slide that attaches to the window sash track. Also available in stainless steel under 39-239C. 

Let us know what you think! Also see the 39-375 cover and handle.