Caldwell balance identification

Quick Learner
Hi, I'm trying to locate replacements for these Caldwell window balances marked: 27 5 HQ Caldwell

I have attached some photos below. Could you tell me what part number I need to replace these?
Thanks,

Matt
A customer submitted image of their channel balance hardware.
4 Replies
Tom
Tom from SWISCO
SWISCO
Expert
Thanks for posting, Matt. Before we can determine what Series you have, we'll first have to decide what bottom shoe that is. Take a look at our 15-001 and 15-002 and let me know which one is a closer match.
Comparison of 15-001 & 15-002
Comparison of 15-001 & 15-002
If it's the 15-001, then you might be looking at our Series 390 channel balance. If it's the 15-002, then you should consider our Series 351 instead.
Handy Person from Long Beach CA
I have the 15-001 so I'm looking at the Series 390. I'm a bit confused about the length though, it measures 28" but it is stamped 27 5 HQ. How do I determine the sash weight range?
Tom
Tom from SWISCO
SWISCO
Expert
The length sounds accurate. Usually the first two digits of the stamp is one number less than the length. A 28" balance with a stamp of 27 5 is normal. As for weight, you will have to remove the sash from the window and place it on a scale.
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