Like the 510 'Diamond logo' pickups that preceded them, the 511 pickups are mounted via four grub screws, two each on the top and bottom edges of the plastic surround. These can be loosened to allow the pickups to be raised or lowered and then simply retightened. Note that the bridge pickup surround is taller than the neck - both are held in place by two screws accessible once the pickup itself is removed.
The nickel plated covers have no logo or branding, just six fixed (staple) pole pieces and six adjustable (screw head) pole pieces, in two columns. Removing the pickups and their surrounds is a simple matter, revealing a small hole in the guitar's top through which the pickup leads enter the guitars body and volume and tone controls.
List of Hofner guitar pickups