The arm of awing window not operating

A quick learner from Daly City, California 94915 says:
Hi , I am looking for the part# of the awing operator. Please see a attached. Thanks,
Kathy
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Emily from SWISCO responded:

Hi, Kathy.

Thank you for your patience during our busy season. Take a look at our 39-312 and 39-453 awning operators. Carefully compare our dimensions to yours and see if either matches what you need. 

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