Searching for 20 4 hu cmc 5

Quick Learner

Feb 6, 2021 9:18 pm

Trying to replace a balance with these markings. 20 4 hu cmc 5 Can you please direct me to the correct one? I think it's a 20" 351 balance. Thanks, Tim

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2 Replies

Casey from SWISCO

Feb 10, 2021 9:56 am

Hello,

It looks like you have either our S351-21, with a 15-002 bottom attachment, or S390-21, with a 15-001 bottom attachment. Take a look at the image below to determine which balance you'll need. You'll also need a 2040 spring strength option for your replacement balances. Thank you!

Comparison of the S351 and S390 balance shoes.