Anderson window winder mechanism with arm, markings #1361318 and #50, arm measures approximately 4 1/2 inches, latch approximately 3 inches. Viewed from outside, it is for a right-side window.
Casey from SWISCO responded:
August 4, 2021
Hello,
Take a look and compare the dimensions of the 39-146 and 39-147 Andersen operators to your original hardware. Thanks for posting!