DRACO Window Locks

A home owner from Plymouth Meeting, PA says:
DRACO window locks. How could one simple lock have so many variations in size with the differences measured in 16ths?

Tried replacing the locks thru the big block stores. Ha! no such luck.

Help. I need nine locks.
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Paul from SWISCO responded:

Hello there. For your former Daco window lock, we are recommending our 90-161 window lock and keeper. We do want to inform you, we have known at times the alignment nubs, do not always match up. We can't say for sure whether or not this will be the case for you. Look this part and get back to us with some thoughts.

A handy person from Plymouth Meeting, Pa says:
Thank you. I will give it a try.
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