Balance Stamped 34C

A contractor from Port Aransas Tx. says:
August 15, 2019
I have multiple windows with this balance. Building was built in 2004 with SH impact glass, possibly Modern Windows. Thanks for your help.
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Bob from SWISCO responded:
August 19, 2019

Thanks for writing in. This balance looks like our S770-34. Just go over all the specifications on the product page to confirm this looks right. You will need a stamp option of 34C. 
34" Series 770 Balance
34" Series 770 Balance
S770-34
$13.77
How to replace a tilt-window channel balance.
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