HD28 channel balances

A home owner from southbury, ct. says:
I have a Norco double hung tilt window with a stamp HD28.House was built in 1986.Are there there any balances that would be a match?
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Tom from SWISCO responded:
There very well could be, but I'm not able to identify what you have based on that stamp alone. I recommend that you look at our Channel Balance Home Page and follow the steps in order to find the Series that best matches what you have.
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