Channel Balance

A quick learner from Torrance CA says:
The back has "21 3 BP Caldwell"
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Emily from SWISCO responded:

Hello there!

Your balance appears to match our S351-22 or S390-22 , depending on the depth of the bottom shoe. The Series 351 has a 1" deep shoe, while the Series 390 has a 1-1/8" deep shoe. You'll need to measure as shown in the picture below to determine the best match. You will also need the 2130 strength option, based on your 21 3 stamp.

Comparison of the S351 and S390 balance shoes.
Comparison of the S351 and S390 balance shoes.
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