Years ago, this Mechanical Puzzle Correspondent had the opportunity to buy the Binary Burr from Bill Cutler and passed!
I spoke with Goh Pit Khiam about 6 months ago about this project after I bought his Ternary Key Puzzle. Brian Young made 30 copies of this puzzle.....and it's sold out!
http://www.mrpuzzle.com.au/prod292.htm
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