Need replaced cranks
Hello, thank you for posting,
Unfortunately we cannot identify from the base alone. To further review, we will need to see pictures of the window sash open where we can view the arm attachment(s). From there we can get a clearer idea of the overall style the window uses to determine a potential fit. Thank you!
Great thank you,
Your window either uses the 39-253RB and 39-253LB or the 39-438B and 39-439B operators. The main difference is the guide at the end of the straight arm. Please compare dimensions and review the video below for clarification.
Also see the 39-375 and 39-376 cover/handles. Let us know if you have any additional questions!