Vintage Marble Unknown Akro? Green White Swirl 1 inch .986 inch Shooter.   Hit spots on this from use is my guess not sure what the 'Marble Term' for these would be.  Please check the pictures to grade it yourself.  We have several lots that we will be listing in the next couple of days.  If you have other details that I should add feel free to send an message and I will update this listing.  Thanks for looking.