Replacement Andersen balance

A home owner from Seattle , WA says:
I've used the Andersen chart to identify my window size as 23 15/16" x 40 7/16"

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Paul from SWISCO responded:
Based on that sash size, I think you might want to consider our 24-1133. If you would like us to confirm, however, I will need to know what each stamp printed on the metal box reads.
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