This is a series of eight 14mm shots showing the rear view of the tusk.
The camera was held as close to the display case as possible without, of course, coming into contact.
When I see this I'm visualizing a noble tossing the tusks down from his saddlebag to a puzzled courtier.
"Here," he says, "see what you can do with this."
Generations of sculptors must have spent their lives doing nothing but planning and carving.