Andersen balance box

A handy person from South Hadley, MA says:
looking for anderson window sash balencer number stamped on back11600-17 windows installed 1987

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Tom from SWISCO responded:
Hey, Dennis. I'm afraid I can't identify what balance you have based on this information. Could you tell me what the other stamps read? Pictures of the stamps wouldn't hurt, either. Sometimes seeing how the numbers are printed is just as important as the numbers themselves.
A quick learner from Belchertown, ma says:
Here are two pics of the balance. One overall pic, and one zoomed in on the part/serial numbers
User submitted photos of a window balance.
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Tom from SWISCO responded:
Great, that's a huge help. Check out our 24-637, which can replace Andersen balance boxes with the stamp 6#23.
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