Identify operator

A quick learner from USA says:
Is this 39-317?
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Tom from SWISCO responded:

Thanks for your patience during this busy season. Your operator looks like an older version of our 39-387. Look this part over and let me know if you agree.

You can also reuse your old bracket, but if that's not possible then I recommend the 39-561

Connecting a casement window operator to stud bracket
Connecting a casement window operator to stud bracket
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How to identify casement and awning operators
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