This is the focusing knob and, as you can see, there's no depth of field markings around it. This means that it is an early 1041 model with the hyperfocal table under the lens cover (which I don't have anymore, of course).
Rear view with the back removed. The two eyepieces are the view finder and the range finder, from left to right. You can see the notch at the bottom of the right aperture, which means it's not a super early 1041 model.
In this view from above, you can clearly see that someone (a previous owner perhaps) wrote "LEMIEN" with a very sharp object. Maybe the camera was owned by a French Canadian or a descendant of one?