PuzzleMad: The Ball and Chain is Going to Cause Much Pain!
Ball And Ring (a.k.a. Ball And Chain)" - Copyright J. A. Storer
Wood puzzle. How to free the ring. - YouTube
Oliver - Wooden String Puzzle - Solve It! Think Out of the Box
Rope and Ring Puzzle Answer - YouTube
Wooden Rope Ring Ball Ring Disentanglement Puzzle Toy Challenge Brain Teaser | eBay
Rope and Rope | My puzzles
Puzzle "Ball & Ring" | Puzzles | Le Dindon
Ball And Ring (a.k.a. Ball And Chain)" - Copyright J. A. Storer
Wood Ball - Metal Ring Rope Puzzle : 16 Steps (with Pictures) - Instructables
Puzzle Solution - two wooden balls, rope and metal ring ???
Amazon.com: Puzzle Master Loop de Loop : Toys & Games
Rubik's Rings / Hungarian Rings
Solution or name to a mechanical puzzle - two rings, three balls, wooden centerpiece - Puzzling Stack Exchange
African ball puzzle | DIY Puzzles
Rope / Ring Puzzle : 8 Steps (with Pictures) - Instructables
Oliver String Wooden Puzzle Brain Teaser - Etsy
Resisting Rings Wood and Metal Puzzle | Bits and Pieces
Amazon.com: Two Lovers String Rope Ring Puzzle - Wood IQ Brain Teaser Mind Game
Metal Ring Puzzle Rope with double wooden balls - YouTube
![Structural principles of the African ball (reproduced from [2], p. 63) | Download Scientific Diagram](https://www.researchgate.net/publication/259608552/figure/fig2/AS:297194717499400@1447868150782/Structural-principles-of-the-African-ball-reproduced-from-2-p-63.png "Structural principles of the African ball (reproduced from [2], p. 63) | Download Scientific Diagram")