anderson sash balancer - replacement

A contractor from Wilmington DE says:
April 20, 2020
Need to replace sash balancer fo this Anderson window

there are three numbers etched on housing: 1600-17, 823,2-89
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Bob from SWISCO responded:
April 22, 2020

If one of the stamps says 823, then see our 24-837. This is meant to replace Andersen balances that include the stamp 823. 
Andersen Sash Balance, 823, 827, 831, 837
Andersen Sash Balance, 823, 827, 831, 837
24-837
$54.20
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