Group of Sculptural Puzzles. United States, mid-20th century. Group of four “decorative” sculptural puzzles including Ego Sculptural Puzzle. Akron: Austin Enterprises, ca. 1960s. Interlocking aluminum and rosewood burr puzzle with original packaging. -- Incas Dilemma II. Meteor, Ohio: Mag-Nif, Inc., 1975. With 18 pieces of wood with 12 aluminum locking rods. -- The Philosopher’s Knot. Los Angeles: Futuristix Products, 1970. A glass orb is trapped inside of a polyhedron constructed of 12 wooden rods and knotted string. In the original box. – [Together with] Wooden Cube Assembly Puzzle. Circa 20th century. Three-dimensional wooden cube assembly puzzle with wood base and acrylic border casing. Approx. 4 ¾ x 5 x 5”. Finely crafted, very good.