Andersen Balancers

A quick learner from St. Louis says:
December 23, 2023
I need to replace the balancers on the attached Andersen windows. Here is what I know so far:
Windows were installed between 1985 and 2002.
Glass on top two windows is 32 7/16 wide and 23 13/16 tall.
Glass on bottom two windows is 32 7/16 wide and 35 15/16 tall.
The markings on the balancers are: P64 12#27 9 84 and 11600-17
Thanks for your help.
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Bob from SWISCO responded:
December 23, 2023

Thanks for posting. See our 24-1231. This is meant to replace old Andersen balances that include the stamp code 12#27, or 1227. Let us know if you have any questions. 
Andersen Sash Balance, 1226, 1227, 1231
Andersen Sash Balance, 1226, 1227, 1231
24-1231
$54.20
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