coil balance identification

A quick learner from Brooklyn says:
Please find attached 2 photos of window balance, which I'm looking for?
Are you able to tell me which one exactly it will be or do you need more information?
Please let me know.

A customer submitted photo of a coil balance.
Profile picture of Paul
Paul from SWISCO responded:
This looks like the old style CertainTeed window balance. The shoe appears to be similar to our 15-155 CertainTeed Pivot Shoe.

As for the coil balance, I believe it would be one of our Series 170. Please look at the number stamped on your coil balance to know what option to choose.
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