1 review for Illusion Practice Blocks (China Computer) by Thomas Pohle, Eckhard Boettcher If you want to submit a product review click here. The inventor of this effect was the German Paul Corduan (17. Februar 1894 – 4. Januar 1961). His stage name was “Doc Corten”. First sold by the German dealer Heinz Jacobi under the name “Corduan-Verwandlungswürfel” (translation: Corduan Change Dice). Thomas Pohle created his first version of this effect when working with Eckhard Boettcher who provided the routines c . 1984. Over the years Thomas has created a number of versions and this is the prettiest version I…