Tom from SWISCO responded:
September 13, 2022
Hello! It's tough to tell what you have while it's still installed, but your balance looks very similar to our Series 751 channel balance. I recommend carefully examining the design of this balance to ensure that it matches your original. If you have any doubts, though, let me know and I will do my best to advise. Close up view of the S751 balance top.
Close up view of the S751 balance shoe.
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