Window coil balance

A quick learner from Pontiac, il says:
June 27, 2021
The markings say 409 j
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Bob from SWISCO responded:
June 30, 2021

I suspect this might be a S170-409 9 pound Coil Balance. The Series 170 Coil Balance interfaces with a 15-192 Pivot Shoe. See the video below for details.
409 Series 170 Coiled Balance Spring
409 Series 170 Coiled Balance Spring
S170-409
$6.57
CertainTeed Pivot Shoe
CertainTeed Pivot Shoe
15-192
$6.39
SWISCO S170 and S171 Coil Balance Assembly
SWISCO S170 and S171 Coil Balance Assembly
VIDEO
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How to remove window pivot shoes
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