can you help me identify this ,,,

Hello,

It looks like you have either our S351, with a 15-002 bottom attachment, or S390, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need to find the stamps on your balance channels to choose the correcsponding spring strength options for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.