winnie teschmacher (born 1958 )

Sphere 17 cm diameter, signed: Winnie z20L N.W. made at the Neil Wilkins studio in Brittain. Clear glas with a black core Blown and polished glass .Depending on you position the object gets blacker or clearer when you stand right for it you get a black line in the middle ( pic 1)and the rest is clear when you move to the right the left part gets black and also the otherway round , you can also turn it then the black goes sideways or up and down.
http://www.teschmacher.nl/video/video-04.html .
Its placed in a rubber ring and i put it on a wooden base .