Paul from SWISCO responded:
October 9, 2023
Hello, Depending on the back set of the installation holes in your lock, you could consider the 90-161 with 2-1/16" hole spacing with a 7/8" back set. We also offer the 90-278 with the same hole spacing but an 11/16" backset. Keep in mind that the front aligners on your old lock are not critical in the operation of the window lock but you will need to confirm that the installation holes are exactly 2-1/16" apart from center to center. Detail of 90-161
Dimensions for 90-278
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