Mental Boxes. Holland: Eddy Taytelbaum, 1970s. Four hinged plastic boxes to hold coins, numbered 1 through 4. With his back turned, the magician identifies the coins that have been placed in each box. Green boxes 1 3/8 x ¾”. The black boxes were constructed by J.H. Van Rinkhuysen, with numbers that were hand-applied by Taytelbaum, ca. 1960s. Fine.