Surface Mounted Single Hung Egress Locks

A distributor from Eagle, Idaho says:
The screws for the lock sit about 5/16" in from the inner edge of the window frame and they are 1" OC.
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Emily from SWISCO responded:

Hi there!

This reminds me of our 26-387 vent latch. Compare our dimensions with yours to see if this matches up to your original hardware. 

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