Single arm operator

Thanks for posting. This looks potentially like our 13-1/2" 39-013 or 9-1/2" 39-027E straight arm operators. See the diagrams below. Compare their dimensions with your old operator and let me know if one matches what you need. If both differ, let us know how and we'll try and find something better.

Dimensions for 39-013

Dimensions for 39-027e