This lot is closed for bidding. Bidding ended on 9/11/2021
Mystery of the Pyramids Outdone. New York: Wellington Enterprises, 2009. No matter which way the decorated canister is turned - right side up or upside down - the pyramid-shaped stack of graduated blocks inside stays right side up. Improved version of the U.F. Grant original devised by Don Potts. Height 7 ½\. Very good."