find the right balance

A handy person from CA says:
it is 24" long and 9/16 " wide.
The numbers printed are: 23 4 JV CMC 7.
Photos show the ends.
Please let me know which part number to use.
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Emily from SWISCO responded:

Hello there!

Based on these photos, it appears you have our S380-24 or S385-24 channel balance with the 2340 spring strength option. The best match will depend on the depth of the balance's bottom fitting as shown in the image below. You'll need to measure yours to determine which Series you'll need for this repair. 

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

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