SWISCO - The Replacement Hardware Authority

Need window crank operator for Roto Casement

A quick learner from Newport Beach, CA says:
This window operator has died and emits metal shavings when you crank it rather than moving the window. It appears to be a Roto casement but I can't identify the model as it appears to have a big plastic interface to the crank rather than a spoked knob arrangement. Please identify what it is and I'll but one. I also need to know how to remove it as it only moves a tiny bit, not enough to access all the screws with appear to be the ones which need to be removed to swap it out.
A user submitted image of crank operator
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Dave from SWISCO responded:
Thanks for posting! Your operator here looks somewhat similar to our 39-081 ROTO casement operator. Do you think that will work for you? Please let me know.
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