Caradco casement mechanism

A home owner from NY says:
I have to replace the window crank for one of my Caradco casement windows and figure the other 3 windows are not in great shape either so I may as well have them all done at once. Thanks to your site I was able to identify the cranks for the kitchen windows, I believe they are 39-155 and 39-156 but the only number I can find on the two very small bedroom windows is R3089 and can't seem to find anything relating to that number. I don't have a picture right now and am not at the house, but had hoped to get this ordered before I actually get back. Do you need a picture or are these numbers enough?
A user submited photo of window operator
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting, and for the pictures! Our 39-155 & 39-156 Caradco Window Cranks do appear to be very close matches to your own hardware. Do the dimensions match? The smaller arm's dimension is one you should take special note of. Is yours 3-13/16"?

You might find it easier to compare to our 39-155 & 39-156 if you remove the operators from your window.
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