Replacement spring balance

Question

I think I've found the right replacements but I want to be sure. They look like 351. No wings on either top or bottom and a 1" shoe. There are two window sizes. The larger window balance has a 27 C stamp and the smaller has 27 B.

Tom · Accepted Answer

It looks like you have either the series 351 or series 390 channel balance.

The difference between the two series lies in the bottom shoe.

Comparison of the S351 and S390 balance shoes.

The series 351 channel balance has the 15-002 shoe while the series 390 channel balance has the 15-001 shoe.

The 15-001 shoe is 1/8" larger from front to back.

I hope you find this helpful. Please let us know if you have other questions.