Two circles of marbles that would not intersect if it weren't for the twist of the Duplex puzzles.

• Inventor: Dmitry Andreev
• Mechanism: Rings of pieces (2D + rotation)
• Patents: Unknown
• Producer: Custom
• Year: 2017
• Original Price: $0.00 USD
• Current Price: No Data

The third implementation of the Duplex concept. This time the inventor used the technique to allow two circles on opposite sites to interfere with each other.
Size: 101 x 141 mm
Weight: 190 grams

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