C2340?

A home owner from Lake City, Florida says:
May 9, 2021

All 15 aluminum windows in my house appear to be the same manufacture except for size and weight. Twelve windows are marked 27C and your S770-27 has worked in those. I have two windows that are marked 23b which I have not replaced but it appears that your S770 series will work there too.

My confusion is with one window that weighs 26lbs. The stamp is C2340 with a "k" spaced before the C2340. It looks like a heavier duty version of your S770 series.

I'm thinking your S770-23E will work but I'm not sure.

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Tom from SWISCO responded:
May 13, 2021

Hello! I do agree that our Series 770 looks like the best bet, but that stamp you're giving me is not standard. However, as long as your sash is 26 pounds, then the 23E stamp should work perfectly fine.
A home owner from Lake City, Florida says:
May 13, 2021
OK, thanks Tom.
23" Series 770 Balance
23" Series 770 Balance
S770-23
$12.32
27" Series 770 Balance
27" Series 770 Balance
S770-27
$12.70
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