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Paul from SWISCO responded:
March 19, 2015
Hello, Dave, thank you for posting. Your window has been out of production for at least 35 years. From your photo, it does look like our S300-21 , but with the smaller 15-020 shoe (see dimensions to confirm). Also see if your bottom sash clips look like our 17-014 and 17-015 . If not, please send a photo of your bottom sash clips so we can identify them.
Regarding your balance fork, they been out of our inventory for around 15 of those 35 years and no one is manufacturing them anymore. The fork makes it easier to install, but to be honest you can just install the balances to the sash. After we confirm what parts you have, I will give you more detailed instructions. |