Anderson Sash Balance

A quick learner from New York says:
This is for a Bay window siz 32 X 39 rounded off all the numbers on it are as follow: 11600-17
BP 30 12127 9 86
I beleive its model # is either a 2832 or a 8670 it is a double hung window with the dble glass looking for replacement sash balance.
Thank you
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Tom from SWISCO responded:
Hmm... I'm not sure what you have. I'm fairly certain that the key stamp here is "BP 30 12127 9 86," but we don't have anything that corresponds to that. Can I see a picture of that stamp? Sometimes seeing how the numbers are printed is just as important as the numbers themselves.
A quick learner from New York says:
Thank you here is the picture of the numbers for you if you need anything else let me know.
User submitted a photo of an Andersen window balance.
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Tom from SWISCO responded:
Thank you! I knew I was on the right track. That's 12#27, not 12127. Believe it or not, that's an important difference. I recommend our 24-1231. This can replace Andersen balance boxes stamped with 12#27.
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