2800 Patriot window balances

A home owner from NJ says:
Do you sell the window balance for the 2800 series Patriot double hung windows? I need to order a replacement so I can keep the top window form falling down when unlocked. Thanks.
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Mike from SWISCO responded:
Good Morning,

There is not one specific balance Series that works with the Patriot 2800 window.

In order to accurately identify your replacement, please submit a few phtoos of your window balance and balance attachments so we can take a look. Are there are any markings on the window balance?
A home owner from NJ says:
Thanks, Mike. It's a coil spring that sits inside a piece of silver u-channel. A few pics are attached. They aren't the best, so I can take out the balance and get you a much better pic if you need it. There weren't stickers on it but I can look for imprints on it if tha is what you mean by markings.
User submitted photo of channel balance.
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Mike from SWISCO responded:
Thanks for submitting your photos to us.

It appears you actually have a Channel Balance. What you will have to do is remove the entire balance unit from the window, and then take a few pictures of the balance attachments.

There should either be an engraved or stamped marking on the channel portion of the balance. See if you can find that for us.
A home owner from NJ says:
Mike,

The engraved marking is 34B. Photos of the balance parts are attached. Thanks for your help.
User submitted photo of channel balance.
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Paul from SWISCO responded:
It's a bit hard to make out the piece, but it looks like the S770-34 (34B). Take a look.
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