Paul from SWISCO responded:
August 24, 2017
You've got a few different things here. To start, the balance shoe is our 15-199 and the nylon coil spring housing is our 15-204, which uses our Series 165 3/8"-wide coil springs. I couldn't read the numbers off the coils in your photos, so you'll need to check. The stamp on the coil is needed to choose a weight when ordering.
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