porter-lite aluminum windows

A quick learner from texas says:

maybe its one of these?
SURFACE MOUNTED WINDOW LOCK, 1-1/2" HCS
Product Code: 90-023

SLIDING WINDOW LOCK, 1-3/8"
Product Code: 90-147
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Paul from SWISCO responded:

Many thanks for your correspondence. Your lock's tongue slides into the top sash groove, so go with the 90-023 Lock. Let me know if you have further inquiries. 

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