Right hand replacement operator

A home owner from Rockland Ma says:

Our 4 pane awning windows are vintage 50 or 60?s. They were given to us and they have no brand on them , we need a right hand operator but can not find one, it measures top center to bottom center 4 3/4 and bottom center to center is 3/4, maybe you can help locate and identify this part,  thank you. MLPigeon

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Tom from SWISCO responded:

I'm not sure what to recommend. It looks like your operator is missing the link arm, which is usually hinged on the gear arm you have now. Without seeing that, we won't be able to identify the proper match. Do you have one that perhaps still has its old link arm? In the meantime, you can see our entire selection here.

A home owner from Rockland Ma says:
Does this help
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Tom from SWISCO responded:

Yes, thank you. The closest operator I could find to yours was our 39-278. Take a look and see what you think. You will likely need to re-drill for the top hole. I could find nothing with the 4-3/4" hole centers from top to bottom.

A home owner from Rockland Ma says:
Will check it out. Thank you
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