The cryptex consists of two main parts, the core and the mantle. The core is just a tube with some notches. For building the mantle five gears were stacked together. Each gear consists of three parts:

  • The inner dynamic ring, carrying the alphabet and having an inner tooth gear. A gap in the ring defines which letter lets the core pass in and out.
  • The ratchet ring, serving as a ratchet together with the tooth gear.
  • The mounting ring, holding the dynamic ring in place.

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