Semco window, lower right latch as you face outdoors.
Two numbers on inside. 45428, and then underneath that number, 25. The letter "A" is marked on a different part of the mechanism.
Bob from SWISCO responded:
November 5, 2020
Thanks for writing. I believe this might be our 38-097 and 38-098. Look them over and see what you think. If you also need a new keeper, look at our 38-079.