Others in general - not Jabos - could be an Alley or other West Virginia company swirl type or a Vitro, etc. There is a possibility that they are all Jabos since there are so many different variations to the classics and just seeing one view (or partial) view of the marble makes it hard to tell. For ecample, there is one to the left of center - white with a green ribbon outlined in darker color that could be other than Jabo. Nothing definitive.