Box of the Celts

This is an engaging sequential discovery puzzle with some unexpected mechanisms.  
The puzzle has been solved and reset a few times by me.
It is in great condition.
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Unravel the knot to unlock the mysteries of the Box of the Celts!
**Winner of the Jury Honorable Mention - IPP (International Puzzle Party) 2021 Nob Yoshigahara Puzzle Design Competition.
The Box of the Celts is a large and complex multi-stage sequential discovery puzzle box with many, many steps, designed with the experienced puzzler in mind – a true “puzzler’s puzzle”.  It is a unique hybrid puzzle that draws together puzzling elements from many different genres – tool-based sequential discovery, puzzle boxes, puzzle locks, disentanglements, coordinated motion, mazes, hidden mechanisms, dis-assemblies, dexterity challenges, packing puzzles, and more.