Need 10 each. The Anderson patent and part numbers stamped on the counter balance are:
US Pat No 3.335.455
and Anderson part number: 11600A-3
Anderson Double Hung Counter Balance
Contractor from Corte Madera, CA (SF Bay Area)
Sep 2, 2025 4:16 pm
1 user uploaded image
2 Replies
Jasmine from SWISCO
Sep 8, 2025 9:44 am
Thanks for reaching out! The part numbers you've provided are the patent numbers for this Andersen balance. I'm confident we can provide you with a replacement but I'll need to see photos of the other stamps/markings on the balance.
They may either be on the "lip" or on the other side of the box.
Please let me know if you have any questions.
