Channel Balance ID

A handy person from San Jose, CA says:
I have a channel balance that is stamped 26 9 LU CMC 1. Looking for a replacement channel balance. I have no idea who the window manufacturer is. But by looking at the photos on your website i believe it is a 1/2" 27" Series 380 with 19-005/15-005. Can you please confirm this by the stamp info only? Thanks.
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Mike from SWISCO responded:
To get started, please submit a couple photos of your balance attachments so we can confirm the correct replacements. You could possibly have the 15-004, not the 15-005.
A handy person from San Jose, CA says:
Attached are some photos.
User submitted photo of channel balance.

26 9 LU CMC 1
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Mike from SWISCO responded:
We will need the weight of the window sash to continue.

Please remove the window sash and place it on a scale and report to us the weight in pounds.
A handy person from San Jose, CA says:
Window sash are roughly 18 pounds to 25 pounds.. 25 being the heaviest one out of group.
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Mike from SWISCO responded:
I appears you'll need the S385-27 Channel Balance with stamp option 2640.

The 2640 will support a sash weight range of approximately 19 through 26 lbs. This information is based on two balances per sash.
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