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Dual Circle
Above:On a stand
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Dual Circle - surprisingly enough is two interlocking circles - pieces move when the circles are turned.

Two interlocking circles one red and black the other blue and black. When one circle is rotated it twists the other circle and changes the colour. The goal is to return both circles to their full colours. The idea was conceived by Bram Cohen. The puzzle was designed by Oskar van Deventer.
The year given here is an upper bound.
Diameter: 60 mm
Weight: 55 grams

Price Tracking Data

DISCLAIMER: The following table contains user-generated content. This information is collected to serve as a rough guideline and is certainly not complete and may not even be accurate. This information is filtered and carefully moderated, but incorrect information will inevitably find its way into the system. Always use your own judgement when buying or selling an item.

Sale Date Price (USD) Sale Type Condition Package Condition Notes Contributors Edit
Oct 22 2012 $71.00 eBay Auction Mint Mint None Oli Sovary-Soos



Thank you to the following people for their assistance in helping collect the information on this page: Zzupler, Jack Lieberman.


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