Channel Balance Identification

A quick learner from Gautier, MS says:
I think the part on the channel reads 34-3 B5 Caldwell. The length of the metal part only is 35 inches (34 15/16 to be exact. I think this is a model 351 that is 35 inches long but I want to be sure.
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Bob from SWISCO responded:

Thanks for posting. This certainly looks like either the S351-35 or S390-35. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. You will need a stamp option of 3430.

A quick learner from Gautier, MS says:
Many thanks!!! My order is placed. You have been very helpful.
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