The big bearing between the pulley and the mandrel appear to be made from steel, with a "bulge" at the center, so there is some axial "wobble", to allow the bushing to be "self-aligning" ( I am presuming ).
The pivot on the small-end, by the gearing, seems to have some lateral run-out; it appears that the bearing is created by the end of the two-tier gear ( which slips over the end of the mandrel-shaft )riding on the nose of the push-in knurled stud that goes through the frame support and also secures the 2/4minute gear casting. Are there any little ball-bearings / springs to take thrust load inside this small-end bearing set-up ?
Are there any good assembly blow-ups on-line ?

Thanks !