Your window cranks

A quick learner says:
Will this butterfly handle fit Marvin casement window cranks?
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Tom from SWISCO responded:

This handle is only designed to work on Andersen brand operators. If your operator is not specifically Andersen brand, then it will not work.

If you aren't sure if you have an Andersen or not, you can show me a couple photos of the part in question and I will do my best to ID it.

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