PAT. #5,139,291. other markings 9E and 375 It is 2.5 inches long.
Paul from SWISCO responded:
January 2, 2018
That patent number actually represents any and all top tilt latches made using this design, but from the photo, it looks like our 26-243 or 26-244 top tilt latch. Please compare sizes to see if this will work.