Mr Puzzle - The design of the Wil Strijbos Aluminium Cross is still as unique and intriguing as when he first created it more than 40 years ago. Even if you see
The Impossible Dovetail Puzzles by Wil Strijbos
Aluminium Cross by Wil Strijbos | Neil's Puzzle Building Blog
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Amazing Aluminum cross puzzle - YouTube
Aluminum Cross (Wil Strijbos)
Sweta Cross take apart aluminium cross puzzle – New2Play