Channel balance

Question

Number on it could be 1840y. I think the window is a Window Master from around 1990.

Thanks

Casey · Accepted Answer

Hello,

With this combination of attachments, you could have either an S380-19 or S385-19 channel balance. You’ll need to measure as shown below. The Series 380 has a 1" bottom attachment, and the Series 385 has a 1-3/32" attachment. You'll also need an 1840 spring strength option for your replacement balances.

Thank you and let us know if you have any other questions or concerns.

Comparison of the S378, S380 and S385 balance shoes.