Sargent and Greenleaf, more commonly known among locksmithing 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.
The company was established in 1865 when James Sargent and Halbert Greenleaf became partners. A manufacturing facility was built in Rochester, New York, and the company remained in that city until 1975. Since then, the company has been in Nicholasville, Kentucky.
S&G locks are used throughout the US railroad industry on high security applications such as for locking locomotive cabs and important main line switches. These high security locks are sold around the world through associated distributors.
Read more about Sargent And Greenleaf: Notable Innovations
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