great wall DF2 medium format camera shutter mechanism

i found this camera to be very interesting internally because it is extremely resourceful. what i mean by that is it has everything it needs and nothing it doesnt.
this is the simplest possible way to make an SLR that i could possibly think of.
it uses the mirror itself as a leading shutter curtain and has a baffle sheet as the second curtain. the winding knob is also how it times the second curtain release and it has a "anti double exposure" system that is extremely simple.