Paul from SWISCO responded:
September 14, 2017
From your photo, it looks like your 15-180 balance shoe and 15-181 support clip are still in good shape. You only need to replace the broken springs, which are Series 190. You'll need to remove the sash, unscrew the coil support and balance shoe, and then look at the end of the spring (the part screwed to the shoe) for the spring weight number, which you will need to place an order.
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