The only stamp on these 25 inch channel balances is 153. I have a longer, smaller window that has a stamp of 183. I am located in Gainesville, Fl. This house was built around 1967-69, but I am not sure how old all the windows are. They all seem to have aluminum frames. The plastic tips are brittle and broken.
Channel Balance stamped 153

Quick Learner from Gainesville, FL
Jul 14, 2024 1:58 pm
5 user uploaded images
3 Replies

Quick Learner from Gainesville, FL
Jul 14, 2024 2:12 pm
It is a 1/2 inch channel, with wings on top and bottom plastic parts, as pictured
3 user uploaded images

Paul from SWISCO
Jul 16, 2024 9:59 am


Hello,
For your 25" channel balance, you would need the S377-25. We believe that your strength option corresponds to the (2430) option for our replacements. To confirm, we recommend weighing your sash to ensure that it falls within the 15-19 lbs weight range for these balances.
The 183 stamped balances should measure 29" long. If so, see the S377-29 replacement. Your stamp should correspond to (2830) for a 16-23 lbs sash. You should be good to go as long as both windows fall within the supported weight range for their sashes. Thanks for posting.

Close up view of the S377 balance top.

Close up view of the S377 balance shoe.
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