Has an R stamped on top
Hello! Your operator looks like it could be a match for our 39-031 and 39-032, however this is just an educated guess. It will ultimately come down to the size of the arms. I'll share our specs below. Your next step should be to review our measurements to see how well they match your original part. If they differ in any way, let me know.
"Left" and "Right" handing is defined differently depending on who you talk to. Everyone has a different idea; in my experience, it's better to just go by the design of the hardware itself. Note which side of the operator the gears are on, what direction the arms face, etc.
For reference, the operator shown in the photos above is our 39-032. The opposite handed side is our 39-031.