Andersen Sash Balance identification

A home owner from Maine says:
I have an older sash balance I believe the numbers are 11600-17, could you recommend what sash balance I need to order?
Thank you
User submitted a photo of a window balance.
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Tom from SWISCO responded:
Thanks for contacting us. Please see our 24-637 Andersen Sash Balance. This can replace balance boxes with the stamp 6#23.
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