window replacement openers

A quick learner from Villa Park, IL says:
I need 3 openers for my Entryguard Truth casement windows. They are all stripped. I have two windows that are about 20x37 and one larger window that is about 27x64. The attached photos are of the 20x37 window. Last year I purchased the replacement locks from you.
Please advise as to the model #'s and cost.
Thank you
User submitted photos of a window operator.
Profile picture of Dave Sr.
Dave Sr. from SWISCO responded:
Thanks for posting. Start by looking at our 39-317 and 39-318. Carefully compare our dimensions with your operators to confirm whether they match.
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