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Rubiks Clock scaled up to greater size.
Looking backwards one might wonder why it took so long until someone actually implemented this. Indeed Tom van der Zanden built a sample no later than 2008 and named it "Master Clock". He was so unsatisfied with the results that he abandoned the project.
That left a chinese with nickname "Little Seven" with the honor to present the first working sample.
In 2017 Barron Wong presented a sample (shown in images 3-4) that is closer to the original.
Diameter: 149 mm
Weight: 234 grams
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