This is my FAV tatting traveler. It is empty so that a pattern could be made from it. I found it at a beauty supply (now out of business) several years ago. It is not discolored - it is meant to look like tortoise.
It has been a quest to find another of these - it won't last forever! I usually keep my give-away tatting kits on one side and a current project on the other. Various pins and needles are conveniently kept in the exposed zipper fabric.