Sash Balance

A handy person from Mesa AZ says:
I was wondering if series 710 would match the image below?
User submitted photo of their sash balance.
Profile picture of Donna
Donna from SWISCO responded:
Your balance is not the S710. Please provide a few images of the bottom fitting so that I can help you identify which replacement balance series you need. Also, what is the stamp on the channel?
A handy person from Mesa says:
I measured the sash it is 29in
User submitted photos of their channel balance shoe.
Profile picture of Donna
Donna from SWISCO responded:
Hi, we need the stamp to determine which strength balance you need. If you cannot find the stamp you can provide the weight of your window sash by removing the window sash from the window jamb channel and weighing it on a scale. Look again for the stamp, it may very faint.
A quick learner from Mesa az says:
The stamp i s: 28 4 CN Caldwell. Hope this help to determine the right series balance.
Profile picture of Mike
Mike from SWISCO responded:
Please take a look at the S390-29 Channel Balance, with the 2840 option. This looks like it could be the correct replacement.
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