Letter Box D-4

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Category: Puzzle Box
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Description
The prototype of this work was produced in 1983.
The structure inside and the mechanism are completely different from those of the "Humibako D Series."
In 2001, the “Humibako D series” was produced and became more practical.
The mechanism has become relatively simple, but please do not make a mistake in the first move.
Goal
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Material: Retail Price (USD):
$215.00
Quality: Variants:
Craftsman Quality, Limited Production
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Number of Pieces: Release Date:
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June 2025
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Number of Moves: Rotations Required:
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