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Casey from SWISCO responded:
November 6, 2018
It looks like you have either an S380-23" balance or an S385-23" balance. The difference between the Series 380 and Series 385 balances lies in the shoe. 
Comparison of the S380 and S385 balance shoes.
The series 385 balance has the 15-004 shoe which is slightly larger from front to back, as illustrated.If you measure your shoe as it is pictured here, you should be able to determine which one you need. Once you have determined your series, you'll want to select spring strength option 2250. |
