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This looks like a somewhat older version of our Series 795 balance. Before we go any further, though, I had a few questions.

First, can you tell me the width of that "T" shaped pivot shoe in your photos?

Second, can you show me how this balance installs at the top of the window track? You'll need to show me an undamaged version, since this balance here looks to be missing all its guts. Those guts are important, so let me now if it's possible.