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Esoteric Mechanics of Vintage Lockboxes
Challenging puzzle for experienced crossword solvers
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Across
  • 1. Protective plate surrounding the keyhole
  • 2. Heavy internal obstacle deterring forced entry
  • 3. Describing the minimalistic inscriptions often found on boxes
  • 4. Famous pin tumbler innovation named after an inventor
  • 5. Numerical sequence unlocking clandestine mechanisms
  • 6. Internal barriers that deflect tampering in historic safes
  • 7. Rotational manipulation required to align tumblers
  • 8. Self-closing catch frequently used in period lockboxes
  • 13. Common tool sometimes repurposed for covert lock manipulation
  • 18. Rotating part translating dial movement into bolt action
Down
  • 9. Secondary mechanism activating upon forced breach attempts
  • 10. Metal clasps critical to securing lids in antiquity
  • 11. Process of configuring internal lock elements precisely
  • 12. Master tool designed to bypass multiple wards
  • 14. Pin-like components whose alignment grants access
  • 15. Component that engages ratchets to prevent reverse rotation
  • 16. Mechanical advantage exploited to overcome bolt systems
  • 17. Antique device specialized for drilling through lock cylinders
  • 19. French term for cryptic numerical lock sequences

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