Paul from SWISCO responded:
April 26, 2016
I'm not sure what it is you're looking for, exactly. You mention that the window won't stay up. Is that the only problem? If so, then this is an issue with the balance itself. Yours appears to be a spiral balance like our Series 600. You could possibly just charge it with a tool like our 75-006 to help it regain its tension. See the guide below for more instructions. If that doesn't do the trick, then it may need to be replaced.
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