Marking seems to say 'WM' or 'MM'.
Forgot to mention dimensions-
Center spacing for mounting holes is 4 1/4"; length fully closed from end to end is 15 3/16".
Hello, thank you for posting,
Your operator resembles the 39-239B that uses the 39-536 pivot slide to install to the track. We also carry the 39-239C stainless steel version. Compare the dimensions to confirm a good fit!
Also see the 39-451 or 39-375 cover and handle depending on style preference. Please review and let us know if you have any additional questions!
