Abstract: A ball display case has base and a cover that is securable to the base. The cover and base at least partially enclose a space for holding a ball when the cover is secured to the base. The cover can be moved to a position in which the cover cannot be non-destructively removed from the base without moving the cover relative to the base away from this position. A lock is adapted for selective application to at least one of the base and the cover. The lock prevents non-destructive movement of the cover away from the position. The lock is adapted for selectively and irreversibly converting the display case from an unlocked condition in which the cover is releasably secured to the base to a locked condition in which the cover cannot be non-destructively removed from the base.