Mortice lock is 3 1/4" assembly without screw posts (4" including screw posts) long, 1/2" wide, 1 1/8" deep (1 5/8" including lock hook) and mounting screws are 3 11/16" between mounting screws.
Casey from SWISCO responded:
April 28, 2021
Hello,
Take a look and compare the specifications of our 82-218 mortise lock to yours. Thanks for posting!