A rare George I teetotum ball made of wood presumably for a complex gambling game as the surface is cut into 32 pentagon facets, numbered from 1 to 32, with the final face bearing  the initials of the reigning monarch GR with a number 1, to certify that the ball was "true."
Note the tremendous skill involved in making each facet precisely the same so that each had an equal chance of turning up when the ball was spun. 
 
Gambling was wildly popular, and Charles II cashed in on the craze by creating the Royal Oak Lottery to raise the money needed to pipe water into London. By 1688 he was renting the lottery for £4,200 per year, franchising "owners" to make as much as they could from Teetotum.