Broken channel balances

Hello!

My recommendation would be either our S380-29 or S385-29 channel balance depending on the depth of the bottom shoe. Measure as shown in the image below to see which is the better match. Your 28-G-70 stamp may correlate with our 2870 spring weight option, which is for a sash weighing 39 to 42 pounds, but you can always weigh yours to confirm. 

Comparison of the S378, S380 and S385 balance shoes.