Channel Balance

A handy person from Pigeon Forge Tennessee says:
I would like to identify this balance and order 2 replacement balances. This is a 1/2 inch channel in a non-tilt aluminum single hung window. They are 20" long, with the stamp "1940" on the channel. Thank you for your help, and great website with lots of great information, clear details and demonstrations.
User submitted a photo of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thank you! I'm glad you like our site. As for this balance, it appears you've only uploaded a picture of the bottom shoe. Can I also see a picture of the top attachment? Thanks!
A handy person from Pigeon Forge Tennessee says:
I thought I had uploaded more, sorry!
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Perfect, thank you! Check out our S390-20 channel balance and let me know if you think this is a good match.
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How to Replace a Non-Tilt Channel Balance
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