casement operator

A quick learner from eagle river, wi says:
Looking for a replacement Semco window operator for a casement window: Viewed from the outside the right side crank reads R30842.
Can you help determine an appropriate replacement part?
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Tom from SWISCO responded:
Sure, I think we can help. However, that number is not enough by itself. If possible, please remove the operator from the window and show us a picture of it by itself. We will need to see the entire mechanism. Thanks!
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