Searching for some unpublished posts I found these pictures.
The old leaf spring is so worn out that it bends upwards an somebody removed the wedges on the axle which adjust the castor (tilt angle of the axis which leads the steering assembly to go automatically back to “straight forward” if you loosen your grip on the wheel.
Bigger shocks, three layer spring (the hole was fixed soon after as well)
The new assembly gives a couple of centimeters more ground clearance, yay