I do not know manufacture of the door or door lock.
Tom from SWISCO responded:
January 4, 2021
Your mortise looks like a match for our 82-238, which is designed to work with a few different types of keepers. Without seeing the original, I have no way of knowing which one you should go with, but you can start by looking at our 89-030 and 89-036.
A handy person from California says:
January 4, 2021
Am I able to purchase both and return the wrong one?
Tom from SWISCO responded:
January 4, 2021
Sure, that's totally possible. You can see our return policy here.