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Tom from SWISCO responded:
January 27, 2022
These look like some old fashioned balances. Based on what I see here I feel confident that you an use our Series 500 spiral balance as a replacement, along with a bottom bracket like our 17-012 (sold separately). These have metal tubes so they won't become brittle like the originals. We've used the Series 500 to repair old wood windows like this for years and years. It's a straight forward and effective solution that's never let me down. |
