Tom from SWISCO responded:
October 28, 2016
Thanks for posting! Please see our 15-087 pivot shoe and Series 180 coil spring. These look like they match your balance hardware. Keep in mind you only need to replace what's broken. If your upper sash is still functional, there's no reason to replace anything. You will need the number printed on the current coil to determine the proper Series 180 option.
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