Crank and handle

A home owner from Phila says:
I need to replace the crank and gear on 4 windows, 3 of the same and one different
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Casey from SWISCO responded:
Hello,
Your GU operator is no longer available but takes a look at the video below showing our experts replacing a GU operator with our 39-315 or 39-316 operator. 
Your other operator looks like the link arm might be mounted on the bottom of the base arm, unlike the 39-315 and 39-316. We would need to see a clear photo of the arms without the screen in the way to determine what replacement you could use. Thank you!
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