David A. S. Howarth's Ultimate Prediction Slate

A diabolical method allows the spectator’s chosen word - any freely chosen word, no forcing - to magically appear on the back side of the wooden-framed slate. Which has been resting inside a large envelope throughout the procedure. The construction of the mechanical slate is unlike any other we have encountered. Includes original typewritten instructions. A few faint letters remain on one surface of the slate from previous testing/use, but otherwise, the prop appears entirely unusued. Very good condition and a rare and unusual method for prediction any freely chosen word. Faint writing marks to the slate.