Bow window crank replacement

A home owner from Tewksbury, Massachusetts says:
I need both hand cranks. The picture supplied is of the crank for the left side window looking out from within the home. I believe I am looking for 39-187 & 39-188 but would like a confirmation from your experts.


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Casey from SWISCO responded:


The orientation of your operator's base arm actually looks like a match to our 39-089 and 39-090. Take a look and see how the specifications compare to yours. Thanks for posting! 

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