Balance replacement

Hey there!

Thanks for reaching out to us. We're happy to look into this. Can you also show us a photo of the inside of the metal channel where the innerspring connects to the pulley mechanism? That'd be located in the middle of the channel.

Great, thank you! Based on your photos, I recommend the S380-27 or S385-27 with the 2640 stamp option. The difference between the two is the depth of the bottom shoe so you'll have to measure as shown below to determine the best match.

Comparison of the S378, S380 and S385 balance shoes.