The long arm is 11 inches and the short arm about 3 inches. IT still works, but it is broken where it attaches to the window frame. I am guessing it is a 39-239B, but want your opinion.
Casey from SWISCO responded:
March 30, 2021
Hello,
I agree that the 39-239B Encore operator and 39-536 pivot slides appear to match the parts in your photos. You'll just need to confirm that the dimensions on our product page match up to your original hardware. Thanks for posting!