Channel balance

A quick learner from United States says:
Hi,
I need to replace channel balance hardware for two sizes of Babco metal single hung windows . I would also like to view a video which shows how to do the replacement where the hook on the block and tackle device hooks in the middle of the channel as these do.
Stamp numbers:
24C Q
28C
28CZ

I?ll be happy to send additional photos if needed.
Thank you.
Tom
A quick learner from United States says:

Hi,

Here is some additional information:

The balance hardware is 1/2" wide.

Some additional photos may help.

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A quick learner from United States says:

Do you also have this

type

lock and top sash guides?

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Profile picture of Kathleen
Kathleen from SWISCO responded:

Hi there, from your photos it looks like you may have our Series 800 balance with our 18-036m top sash guide, but be sure to look over the dimensions to be sure.

For your lock and keep, and I think our 90-025 and 90-114 could work. Again, just be sure to check everything out to make sure you agree!

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