Casement operating replacement

A quick learner from Casement window says:
HouSe was built in 1968 looking to replace a couple of cranks I can't get a picture to post for some reason

User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting! Would you happen to know the manufacturer of the window? Could we also perhaps see a few pictures of the operator arm? I can't quite make it out in the images provided, and it would be of considerable help while we search for a substitute. Let me know!
A quick learner from Minnesota says:
Sorry Pella is the manufacture, I am enclosing a bunch of more pics, the arm total length from crank to gear is 10 inches, let me know if you have any other questions, I am happy to get you answers... and thanks for thinking I am a quick learner. The arm on the broken units are missing so I enclosed on that is attached, if you need me to take that apart I could.
So; 1968 / Pella, with a 10 inch arm and the mechanism is very thin.

Thanks again

User submitted picture of window operator.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for getting back to us, Tom, and for the additional pictures! Have you seen our 39-385 & 39-386 Pella Egress Roto Operators? Do you think you can use these as substitutes? Let me know!
A landlord from Beverly Hills, CA says:
Pella made two types of Roto Operators and your photos show both types. One type is the Roto Operators and the second type is the Egress Roto Operator. These are usually in the bedrooms which need the emergency egress for one side of the window - thus you will have one side which is Egress Roto Operator and the other side is the Roto Operator. The Egress Operator has a straight arm since the window has to open completely unlike the Roto Operator which can open in the middle of the window. And Pella makes Roto Operators and Egress Operators from approximately 1967 to 1993 and from 1993 on. I'm really familiar with the early types since I have these personally in my home.
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