An open/unlocked combination puzzle box that uses letters and numbers as the secret password.  The inner compartment shown is used to keep secrets safely locked away.  This is also known as a Cryptex.

Royalty-free stock photo ID: 1120976

An open/unlocked combination puzzle box that uses letters and numbers as the secret password. The inner compartment shown is used to keep secrets safely locked away. This is also known as a Cryptex.