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Medial Rhombic Triacontahedron SkewbA skewb in name of the name giving solid. This shape is the first stellation of the rhombic triacontahedron.
Medial Trapezoidal HexecontahedronA variant of the Masterball in shape of the namegiving solid.

Medieval 4Dino Super-Offset-SkewbA transformation of the Dino-Eye-Nazari, in the form of a chamfered Cube-Octahedron, with “windows”.
MedusozoaA Cutter Cube truncated into an octagonal barrel and painted with two jellyfishes.
Meekbull CubeThe Inverted 3x3x3 meets the half truncated cube.

Meffert's Challenge - Prof. CubeGuide book sold with the 5x5x5 by Mefferts
Meffert's Challenge - PyraminxGuide book sold with the Pyraminx by Mefferts
Meffert's Challenge - Skewb CubeGuide book sold with the Skewb by Mefferts

Meffert's Challenge - TetraminxGuide book sold with the Tetraminx by Mefferts
Mefferts 1982 CatalogueIncludes a number of puzzles that were never produced.
Mefferts Challenge - Creative 3D Puzzle BallGuide book sold with the 3D Creative Puzzleball by Mefferts

Mefferts Challenge - ImpossiballGuide book sold with the Impossiball by Mefferts
Mefferts Challenge - MegaminxGuide book sold with the megaminx by Mefferts
Mefferts Challenge - Skewb UltimateGuide book sold with the skewb ultimate by Mefferts


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