Anderson Sash Balance
Hello! That's a good question, and it has a simple answer: Andersen hardware is only used on Andersen windows. There is no exception to that rule that I know of.
The best and most reliable way to identify these balances is to use the stamps printed on them as a reference. The trouble with that is that there are many variations of the same stamp, and multiple other, less important stamps on the box. It's not always going to be in the same place between balance assemblies and it's not immediately obvious what the key number is.
The good news is that we can help. Showing me a photo of each stamp printed on your balance will allow me to check our records for a match and make a recommendation. You can upload your photos right here for me to review.