Balance replacement

A quick learner from USA says:
April 21, 2023

Good morning,

I need to find the balance needed for my Andersen window. These windows were installed in 1985. I find the following stamps on the current balance. There is no identification on the window itself.

Andersen Bayport11600-17

BL13 10#31 5-85

Can you give me the part number needed based on the above information.

Thanks,

Blain 

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Casey from SWISCO responded:
April 24, 2023

Hello,

The 10#31 stamped on your original assembly indicates that you would need the 24-1033 Andersen sash balance for your window repair. Take a look and let us know if you need anything else. Thanks for posting! 
Andersen Sash Balance, 1027, 1031, 1033
Andersen Sash Balance, 1027, 1031, 1033
24-1033
$54.20
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