Tom from SWISCO responded:
March 15, 2018
Hello! Hopefully we can help. We don't have this exact kind of balance, as it's no longer made, but we believe you can substitute with our Series 500 spiral balance and 17-012 bracket. Look this hardware over and let me know what you think.
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Paul from SWISCO responded:
March 23, 2018
If you found that the Series 400 you purchased worked, see our 17-031 bracket. This is compatible with the Series 400 spiral balance.
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