Thanks for posting. See our 24-1231 Andersen Sash Balance. This is meant to replace old Andersen balance boxes that include the stamped code '12#27', or 1227.
A quick learner from Woodbury, NJ says:
March 11, 2019
Hi,
Here is a picture of my existing sash balance with the part number as indicated, BP14 12#27 8-85.
Can you please confirm the replacement part number for this item so I can order it from you.