balancer replacement

Thanks for writing in! Your channel balances look like they could be either our S380-27 with a 1" shoe or the S385-27 with a 1-3/32" shoe. To determine which series is needed for your window, look over the dimensions from the diagram below to confirm the depth of your bottom shoe. Let me know if it does not match either measurement.

Comparison of the S378, S380 and S385 balance shoes.

Unfortunately, I am unable to cross-reference the stamp from your balance. You'll need to obtain the exact weight of your sash to determine the stamp you need. Once you have the sash weight, you'll be able to select your stamp from the list of weight ranges on the chart below the product description of the balance you need.