Thank you

No. Since your stamp reads "5#23," you want the 24-531 instead.
The 11600 stamp isn't important and should not be used to identify a match.
We do! With a stamp of "9#27," you can use our 24-939 as a replacement. You can place an order for this product directly on our site at your convenience.
Hello! Since your old stamp reads "10#31," my top recommendation is the 24-1033 Andersen sash balance. This can replace all balance boxes with that marking.
Please let me know if you had any other questions and I'd be happy to assist.
Hello! That's almost certainly 7#27. I've never seen a 7#87 stamp before, whereas 7#27 is very common, so I think we can safely rule that out.
My top suggestion would be the 24-737.
Hello,
Your 12#31 stamp would correspond to the 24-1231 Andersen sash balance. Take a look and let us know if you have any other questions. Thanks for posting!
The 6#23 stamp on your assembly matches the 24-637 Andersen sash balance. Just let us know if you need anything else.