The Mystic Cannon Circa 1950: complete!

This is a scarce little effect and rarely found complete.  IT is a solid brass mini “cannon”.  The top is unscrewed and six small cannonballs (bb’s} are rolled out.  The cannon and bals are given to the spectator an they are told to load the canon with as many balls as they wish and then seal the canon back up with the screw in the end.  The magician can immediately tell how many balls are in the cannon!

This is precision crafted.  It could not be made to day for the price I am asking. Rarely found compete this includes the cannon, all original balls, the original instructions and envelope (envelop is not completely intact but still amazingly there).  It is in excellent condition and functions perfectly. The cannon is 3.25 inches long.