Vynal jamb liners and balance

A contractor from Cambrbge Massachusetts says:

Balances no longer work and foam behind liners has compressed. Ther is a marking on balance "30 hd" and "Bailey pa" hope this is helpful . I am looking to replace entire unit.

Thank You

Dave

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A contractor from Cambrbge Massachusetts says:
Also the sash have had 1/4" thermopane installed and are 34" wide
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Tom from SWISCO responded:

Hello, Dave. I'm not sure what you have, unfortunately. We have dozens of different balances with that stamp. It's not a product code or anything, it just indicates the strength of the spring.

In order to figure out what Series this is, I need you to remove an undamaged version of this balance from the window and show me clear pictures of the top and bottom ends. I also need to see a picture of the shoe, clip, or hook at the end of the cord.

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