Sash balance replacement

A home owner from Montrose, PA 18801 says:
August 23, 2021
I have Andersen dual payne double hung windows that were installed in 1973. They are in good shape but, I have some broken cords. I have removed the top plate and the only numbers found are: a small D1 space 7 space 27. The windows are 36 wide X 45 high. What replacement balances do I need?
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Emily from SWISCO responded:
August 27, 2021

Hi there!

If your balance is marked "727", then you'll need our 24-737 Andersen sash balance. This is meant to replace old Andersen Sash Balances that have the stamp code 7#27 or 727.
Andersen Sash Balance, 725, 727, 731, 737
Andersen Sash Balance, 725, 727, 731, 737
24-737
$54.20
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