On the balance the only marking are S19-1027-6-88 on one side. Also 11600-17 on staple end of balance. on up side are 336-5455. I beleive a patent number. A U.S. patent Number .11600-3.
Would have sent pictures but number were hardly seen.
measures 6 3/4 by 3 inches 3 inch wide.
Casey from SWISCO responded:
October 16, 2023
Hello,
The 1027 stamp on your assembly indicates that you would need the 24-1033 Andersen sash balance for your repair. Take a look and let us know if you need anything else. Thank you!