End part of a balance

A quick learner says:
August 12, 2019
this comes from a window that is not extremely old but old enough i guess.
Thumbnail of the uploaded file named webcam-8/12/2019, 11:17:37 AM.png
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Paul from SWISCO responded:
August 16, 2019

The part you are showing us is called a knife lock shoe. This is our 15-014. Since your part has broken, you may want to pay attention to your balances. With the shoes broken, it tells us that the balance is not too far behind. 
Balance knife lock Shoe
Balance knife lock Shoe
15-014
$1.09
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
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