Thanks @NorthWest1 It's from my 1920s house here in Pittsburgh, PA USA. The lock doesn't have any markings to identify it. The cylinder says R Knob W which wasn't of much help.
I agree. I think it goes with the thumb press buttons at the bottom. Just can't find anything for the arm to swing off of.
Greetings,
I had to rebuild my mortise lock after dropping it on the floor. I couldn't find a diagram (or even figure out what brand/model it is). I am down to the last piece.
Can someone please tell me where to place the last piece. I can't seem to figure it out.
Thanks so much for any help...