Did not find any markings

A handy person from Ilinois says:
April 7, 2021
Windows are about 20 years old.
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Tom from SWISCO responded:
April 12, 2021

Hello! Your pivot shoe looks like an older version of our 15-180. I would recommend that product, as well as our 15-182 bushing, 15-186 clip, and Series 190 spring. These parts should work perfectly well for you.
Balance Bushing
Balance Bushing
15-182
$1.80
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
Coil Balance Clip
Coil Balance Clip
15-186
$5.05
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