Extremely Puzzling

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Puzzle Details:
Group:
Sliding Piece Puzzles
Produced/built by:
 
Designed by:
F.G.Dustin
Comment:
US Patent 1993211 from 1935; goal: slide to usual 1 to 15 scheme, uses rotations
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Last change: 2025-01-14 [TO MY HOMEPAGE] © Goetz Schwandtner 2008