Paul from SWISCO responded:
July 7, 2017
You have an old Security Window balance system. We will need to custom make it. I'm thinking a standard 1/2" wide, 30" long channel balance with a 2930 stamp. We would install a 19-042 top and 15-005 bottom. Does that look good to you? If so, let me know how many you need and I can email you a custom balance order link.
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