Mechanical-puzzle-box Link

: Historically, they were used to secure jewelry, legal documents, or traveler's money, serving as a primitive but effective safe. 2. Mechanical Core Principles

: Small magnets or hidden pins that drop into place based on how the box is tilted or shaken. mechanical-puzzle-box

Mechanical puzzle boxes are handheld objects that require a series of physical manipulations to open or solve. Often referred to as "trick boxes" or Himitsu-Bako in Japanese culture, they combine intricate joinery with hidden internal mechanisms like sliders, gears, and magnetic locks to secure a secret compartment. : Historically, they were used to secure jewelry,

How This Guy Makes the World's Best Puzzle Boxes | Obsessed | WIRED they were used to secure jewelry