Paul from SWISCO responded:
November 7, 2017
You have an old, discontinued coil spring balance system. You will need the new style Series 140 with new pivot bars. The bars will be 26-405 or 26-398, whichever one matches your screw holes. For the 5+5+5 coils, it will be S140-15, and 5+5 will be S140-10.
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