A small section of the optical scan done of cylinder 14-2403. Thick dark lines are the recorded groove bottoms. Thinner more irregular lines are marks from a bad playback stylus damaging the surface.
A view of a small section of an optical scan of the broken cylinder. The missing section is visible but the rest can still be played back, something not possible with traditional playback. The Left half of the image shows a small portion of the cylinder. The right half of the image is a zoomed in view of the data inside the small yellow rectangle on the left.
Zoomed in view of a small portion of the cylinder. The black web like structure is surface damage due to mold eating away the surface and creating surface depressions. The damage is severe enough that it is visible on the surface of the cylinder.