Andersen balancer part numbers?

A quick learner from Roselle Park, NJ says:
Installed pic is right side looking out; removed is left side. The side with the Andersen Window logo is stamped 11600-17 near one corner and K4 8#27 7-87 near another corner. Side with 2 round indentations is stamped 11600-3. This side also has U.S. and CAN Pat numbers.

Which balancers do we need (both right and left needed)? Let us know if you need any other info.

Thanks,
Thumbnail of the uploaded file named 20190602_155653.jpg
Thumbnail of the uploaded file named 20190602_155734.jpg
Profile picture of Bob
Bob from SWISCO responded:

Thanks for posting. See our 24-837 . This is meant to replace Andersen balances stamped 827 or 8#27 and will work on either side of the sash.

Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.