Casey from SWISCO responded:
December 30, 2019
Hello, It seems like you have gathered all of the correct information. As long as the bottom attachment of your balance matches the 1" depth shown in the image below, the S380-27 looks like the correct balance for you. As long as the stamp on your balance shows something along the lines of (26 3), then 2630 will be the correct spring strength option as well. Thank you! Alternate view of 15-005
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