Microscope and accessories - faulty maybe? (Shephall SG2)

Microscope with. Instructions and accessories (slides etc). Think from the 70s, have checked bulb all working (takes 2 aa batteries not included). Couldn’t seem to see things other than dirt on the lens? If you’re handy at fixing things would be good, but imagine it’s not completely straight forward (famous last words?)
COLLECTION only from shephall

       
Approximate Location         Show marker