Trying to ID Andersen Window Balances

A home owner from Annandale NJ says:
December 12, 2018
Need to replace 2 sets Anderson Narroline double-hung windows sash balances. The numbers are 1600-17 and then 1-13? then BU35 then 8 92. House was built in 1992. Thanks for your help.
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Bob from SWISCO responded:
December 12, 2018

Hello and thanks for contacting SWISCO. I think I can help you but I will need more information. Could you take a photo of each stamp on the balance? The way that the stamps are printed are often as important as the numbers themselves, and they will help us narrow down what you need. Thank you!
A home owner from Annandale NJ says:
December 12, 2018
Thanks Bob. We only took 1 picture. It is the left hand balance of the left window . There are 2 double-hung windows next to each other. Let me know if we have to photo each sash balance.
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Paul from SWISCO responded:
December 13, 2018

Thanks for getting back to us. It looks like the stamp on the tab by the stable says '1131', which would match one of our Andersen Balances, the 24-1133. To be absolutely sure though, could you provide us with the visible glass size of the top and bottom sashes, both the width and the height? That might help us confirm what to choose. 
A home owner from Annandale NJ says:
December 13, 2018
thank you Paul. The height is 27 3/4 width is 32 1/4. Diagonal is 42 1/4 approx.
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Bob from SWISCO responded:
December 15, 2018

Thank you! Yes, I think our 24-1133 is our best bet. As long as that stamp reads "1131" then you should be good to go.
Andersen Sash Balance, 1133, 1131
Andersen Sash Balance, 1133, 1131
24-1133
$54.20
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