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  2. Sargent & Greenleaf - Wikipedia

    en.wikipedia.org/wiki/Sargent_&_Greenleaf

    Sargent & Greenleaf, Inc., more commonly known among Safe and Vault technician circles as S&G, is a U.S. company that manufactures combination locks, key-operated safe and safe deposit box locks, high security military padlocks, and associated equipment.

  3. Frederick S. Holmes - Wikipedia

    en.wikipedia.org/wiki/Frederick_S._Holmes

    Frederick S. Holmes was an American safe and vault engineer, [1] and inventor who designed the largest vaults in the world. During his career, Holmes designed over 200 vaults throughout the United States, Canada and Japan from 1895 [2] to 1941.

  4. Safe - Wikipedia

    en.wikipedia.org/wiki/Safe

    A fire-resistant safe is a type of safe that is designed to protect its contents from high temperatures or actual fire. Fire resistant safes are usually rated by the amount of time they can withstand the extreme temperatures a fire produces, while not exceeding a set internal temperature, e.g., less than 350 °F (177 °C).

  5. Hall's Safe & Lock Co. - Wikipedia

    en.wikipedia.org/wiki/Hall's_Safe_&_Lock_Co.

    The Hall's Safe & Lock Company was an American [1] manufacturer of locks, safes, and bank vaults throughout the second half of the 19th century.. Incorporated by Joseph L. Hall in 1867, the Hall's Safe & Lock Co. of Cincinnati, Ohio quickly grew to become the largest [2] safe and vault manufacturer in the world.

  6. United States government safe and vault door specifications

    en.wikipedia.org/wiki/United_States_government...

    A United States Government Class 5-B vault door, which has been tested and approved by the Government under Fed. Spec. AA-D-600D, is ballistic resistant and affords the following security protection: 20 man-hours against surreptitious entry. 30 man-minutes against covert entry. 10 man-minutes against forced entry.

  7. National Safeman's Organization - Wikipedia

    en.wikipedia.org/wiki/National_Safeman's...

    The National Safeman's Organization (NSO) is one of North America's largest trade associations of safe and vault technicians. It provides technical training in safe-cracking at periodic "Penetration Parties" and offers three levels of certification: Registered Safe Technician (RST) Certified Journeyman Safecracker (CJS) Certified Master ...

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