Andersen sash counterbalance

A home owner from Ohio says:
number on current spring appears to be E15927L71...I can not find a cross reference or a direct replacement...can you help identify ?
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Paul from SWISCO responded:
I believe the key stamp here is "927." Can you confirm that these three numbers are printed differently, perhaps spaced off, larger or in a different font? The way the numbers are printed is just as important as the numbers themselves. If so, I recommend our 24-939.
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