Replacement - which one is correct?

A quick learner from Winter Haven, FL says:
I need to replace broken Block and Tackle Window Balances. Do not know who is the window manufacturer. It is a non-tilt window and side load. Measurement is 15" and a 9/16" channel.

The window has a label w Mfg Code YOM-1 Series 9500. Window H-R50 53x74

The marking on the broken one is 14DS (BSI) GL and a 23. Please advise ASAP. Thank you
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Tom from SWISCO responded:
Thanks for all the information! Unfortunately, we can't identify the Series of balance you need unless we see photos of both ends of the balance. If you respond with photos, I can try to identify it for you.
A quick learner says:
Pictures of the one that is not broken
User submitted photos of a window balance.
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Paul from SWISCO responded:
Thank you! I think you could have either our Series 390 or Series 351 channel balance, depending on the depth of the bottom shoe. That is the only difference between them.
A quick learner says:
How do I measure to correctly determine the depth of the shoe? I'm a very visual person, so
Maybe you can send me a pic or illustration? Thank you
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Tom from SWISCO responded:
You would measure the depth, which is the heel-to-toe measurement. We have detailed pictures and dimensions on our site. I will also post them here for you to consider.
Comparison of 15-001 & 15-002
Comparison of 15-001 & 15-002
How to Replace a Channel Balance Attachment
How to Replace a Channel Balance Attachment
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How to Identify Replacement Channel Balances
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How to Replace a Non-Tilt Channel Balance
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