World’s Greatest Prediction Chest. Columbus, Bob Mason/Arturo, 1972. A handsomely crafted hardwood chest contains a prediction of a forthcoming newspaper headline. Exceedingly clever method allows the prediction to be loaded in full view of the audience. Includes key box, prediction chest, and key. The larger box 8 x 6 x 6”. Hallmarked. With instructions. Very good. Rare. A decidedly low-tech version of this venerable piece of magic apparatus, which was devised by Bob Mason and manufactured for him by Arturo. Unlike other chests, Mason’s requires no special hardware prone to breakage or distress, and the billet containing the prediction is a substantial folded slip of paper, when compared to the Loyd, Nelson, and Owen models.