A home owner from Boston says:
I'm looking for the operator to replace my old one. It's Simonton windows and made in 1995. There is a number under the window which is 421412/O3, JOO 35. Thank you for your help!
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Dave Sr. from SWISCO responded:

Thanks for posting. I'm afraid that your operator is no longer available. Take a look at the 39-388 along with all the related parts. You might be able to use this operator with one of the related brackets. Take note you will need to reverse the detach clip 39-105 and install it on the bottom of the operator link arm so to attach it to one of the sash brackets installed on the bottom of your sash. I have never actually done this, but not sure what else you could use. Let me know what you think.

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