Replacement for ANDERSEN SASH BALANCE circa 1986

A handy person from Woodbury, CT says:

I'd like to replace the ANDERSEN SASH BALANCEs on a window but can't find the part number in you catalog. As best I can tell the parts were manufactured June 1986. It looks like the part number is 11600-17. The right and left appear to be the same.

The glass in the sash is 36-3/8 W x 24 H. They are double pane. Photos are attached.

What replacement do you recommend?

Lee

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Bob from SWISCO responded:

Hi Lee. Take a look at our 24-1033. This is meant to replace Andersen balances with the stamp code 1031. 

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