Anderson Double Hung Balance Replacement

A handy person from R.I./ Long Island says:
I need to replace two sets of Anderson DH Balances. One window glass pane size is 28"H by 24 1/4"W, both upper and lower, and the 2nd window is 28"H by 28"W Upper, and 36"H by 28"W Lower. That is also the glass pane size.

Hard to read but the first window has what looks like it is etched CIG-2 3 88 on it, and the 2nd IGCC @ CBA on it.

The window sizes are all we have to work with. The window markings are too faded to read, and there are no stamps or identifying markings. They are standard, double pane, Anderson, narrow line windows; glass size 28H X 24W over 28H X 24W, and 28H X 28W over 36H X 28W. Might those pane sizes tell you the window model numbers? A Home Depot guy told me to measure the glass and that was all he needed?????

Could you please email the part numbers to me so I can make an online order. Thank you! R/Doug
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Paul from SWISCO responded:
Thank you for your patience in this matter. Without the stamps, it's very hard to say what the appropriate option would be. For the fist sash, our best guess would be the 24-837. For the second unit, I think you should look at our 24-1231 and 24-837. Again, we can't be certain that these would work. I recommend that you try to find and discern what your balance stamps are.
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24-1231 : Andersen Sash Balance, 1226, 1227, 1231
24-1231
Price: $24.46
Andersen Sash Balance, 1226, 1227, 1
24-837 : Andersen Sash Balance, 823, 827, 831, 837
24-837
Price: $23.50
Andersen Sash Balance, 823, 827, 831
How to replace an Andersen Window Balance
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How to replace an Andersen Window Balanc...