Window balances

Hello, thanks for posting! It looks like you could have either our S380-29 or S385-29 with the 2820 stamp option. The difference between the Series 380 and the Series 385 lies in the depth of the shoe. Take a look at the picture below for more detail. Once you have determined this dimension you should be able to select the appropriate balance. 

Comparison of the S378, S380 and S385 balance shoes.

In regards to your top sash guide, take a look at our 18-180 and see if the dimensions match up to yours!