"Guttman" ball
"Guttman" ball
Six ivory balls
1750
Superball made of synthetic rubber
1965
Wooden ball
Scioptric brass ball
3 rubber balls
Scioptic ball
1780-1840
One ivory ball turned inside solid
1843-1884
Ball of wood carved on a small
1890-1913
White early plastic ball
Scioptric ball
Spherical silvered glass ball in wooden box with viewing hole
1850-1924