Replacement channel balance

A handy person from Sacramento, CA says:
This is a non-tilt channel balance. It has markings: "12-5 IE5 CMC 75"

The width is 1/2 or 9/16", the length of the metal part is 13". The shoe depth is 1" from the back of the flange to the widest part.
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Emily from SWISCO responded:

Hello there!

Thank you for reaching out to us. If your bottom shoe measures 1" deep, the S380-13 would be what you want. Your 12-5 stamp indicates you'll need the 1250 spring strength option as well. However, we don't have this option so it will need to be a custom order. Can you just tell me how many balances you're looking to purchase? I can email you a purchase link once I know that. 

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