Identifying proper replacement

Thanks for reaching out to us! We should be able to help with this. Can you show us a photo of the inside of the metal channel where the innerspring connects to the pulley mechanism? Can you also confirm the depth of the bottom shoe? 

Thank you for the additional photos! My recommendation is either the S351-29 or S390-29 depending on the depth of the bottom shoe. You'll have to measure as shown below to determine the best match. I also recommend the 2830 stamp option based on your old stamp.

Let me know if you have any questions!

Comparison of the S351 and S390 balance shoes.

Yes, we do! It's always a good idea to replace the balances on both sides of the window. Using an old balance and a new balance in the same window would cause the newer hardware to wear out much faster as it has to pick up the slack for the weaker, older balance. 

You can return the balances for a refund if they don't fit. Our return policy can be found here just in case.