stamped A3145

A home owner from Davis, CA says:
my spring balance is stamped "A3145"
Should I order the 3140 or the 3150?
Profile picture of Paul
Paul from SWISCO responded:
I'm not sure! That is a peculiar stamp. Do you know what SWISCO balance Series you have? Can you also tell me the weight of your sash? Finally, if possible, I would like to see a few pictures of your balance. Thanks!
A home owner from Davis,CA says:
I do not know the maker of the balance. It came out of our window which is not labeled with maker.
According to my bathroom scale, sash is 26 pounds.
Metal part is 32 inches, body of spring is 17 inches plus hooks on each end. The ends appear to match the SWISCO 350, except the top end is black. Your website indicates #3140 handles 23-28 lbs.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thank you! Based on your pictures, I believe you have our S350-32 channel balance. As for the stamp, I think it's best to go with our 3140 option, like you said, since it can easily carry the weight of your 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 856-317-6263 or at