Tom from SWISCO responded:
November 6, 2014
The manufacturer has actually discontinued your coil balance system and recommend our Series 152 coil balance spring as a replacement. From your photo, it looks like it has a #8 printed on it so our S152-8 coil spring and our 15-158 pivot shoe would be the best place to start. Other parts you may need if they're broken or missing are our 15-143 support flange, 15-144 support cap, 15-145 support barrel and 33-072 screw. Finally, for your tilt latches, see our 26-120 and 26-121 and compare your measurements to ours.
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