Left and right cord sash replacement for Andersen window.

A home owner from NORTHAMPTON, PA says:
January 21, 2024
Window glass is 27 inch wide by 38 inch high. ANDERSEN brand installed approximately 1987

Left sash markings "J30 5/23 2-87" and "12600-17"

Right sash markings "J38 5/23 1-87" and "12600-17"
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Bob from SWISCO responded:
January 21, 2024

Thanks for posting. See the 24-531. This is a nonhanded Andersen Balance meant to replace old Andersen sash balances that include the 523 stamp code. Let us know if you have further questions. 
Andersen Sash Balance, 519, 523, 525, 527, 531
Andersen Sash Balance, 519, 523, 525, 527, 531
24-531
$54.20
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