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UGEARS Engine Clock 3D Wooden Puzzles for Adults - Mechanical 3D Puzzle Clock Kits for Do It Yourself, Functional Table Clock with Moving Pistons - Miniature Kit Models for Adults to Build - 265 Pcs

UGEARS Wooden 3D Puzzles for Adults - Astronomer Table Clock with Tourbillon Model Kit - Mechanical Clock Kit Functional DIY Miniature Kit Wood Crafts for Adults - Gifts For Puzzle Lovers - 338 Pieces

UGEARS Wooden 3D Puzzles for Adults Aero Clock - Mechanical Puzzles For Adults, Wall 3D Clock Puzzle with Pendulum Model Kit - DIY Miniature Kit Crafts For Adults - Gift for Dad, Men, Family - 320 Pcs