Anderson window balance 11600-17 | E52 9#27 12-86

A quick learner from Sea Isle City NJ says:
I'm having trouble identifying the current part number for an Anderson Narroline window balance. The visible glass on the lower sash measures 24" high x 32 1/2" wide. There are two sets of numbers on the broken balance: 11600-17 and E52 9#27 12-86. We are not the original owners of the home but judging from the condition of the windows they were probably installed when the house was built in 1987.
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Mike from SWISCO responded:
Thanks for posting, Monica.

Your Andersen Sash Balance replacement is the 24-939 Balance.

The 24-939 Sash Balance can be used with the following stamp numbers: 927, 931, 937 and 939.

Your stamp, 9#27, fits under this list.
A quick learner from New Jersey says:
I have double hung windows I can find tow numbers on the balance
On the bottom , inside the window is 11600-17 on the top , in the sash is11600A-3. on both sides ir looks like the 11 have been hand stamped
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Tom from SWISCO responded:
Thanks for posting.

As Mike suggested above, you should take a look at our 94-939 Anderson Sash Balance. If it doesn't appear to match your own hardware, let us know and we can work from there.
A quick learner from Pennsylvania says:
My sash balance stamp number is E20 9#31 3 85. Will the 24-939 work as a replacement for me?
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Donna from SWISCO responded:
Yes, SWISCO product code 24-939, Andersen Balancer, will replace an Andersen balance box with E20 9#31 3 85.
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