Need to replace channel balances
Thanks for reaching out! I was able to narrow down the replacement balances you need, but I'll need to confirm just a few more details to confirm the exact recommendation.
Please provide a photo of the bracket in the center of the balance. This is where the spring and the string meet in the middle.
You'll also need to confirm the exact weight of your sash. Unfortunately, I cannot cross-reference your stamp with those on our balances.
Feel free to reach out with any questions.
Does this photo work?
Also, the thickness of the metal in this profile is 1/2 inch and the horizontal measure (width) of the plastic shoe is 1 inch.
The sash weighed in at a tiny bit over a pound. 1 lb + 0.2 oz
Yes, these photos do help. Based on the depth of your shoe, your balances can be replaced with the S351-35 Channel Balance.
Regarding the sash weight, it sounds like you may have weighed the balance. The window sash is the moveable part of the window. That is what you'll need to weigh to determine the weight range your balances will need to be rated to support.
There is a chart below the product description of the balance (which can be viewed by clicking the link). Once you've weighed the sash you'll be able to determine the stamp from that list.