Sargent & Greenleaf Combination Lock
Model no - 6731-017 Year 01-2016 4 wheel Group 2
The James Sargent Lock Company, founded in 1857 by James Sargent, specialized in safe locks. In 1865, he partnered with Halbert Greenleaf, a former employer, to form Sargent and Greenleaf (S&G). S&G is known for
introducing the first large-scale, commercially produced time lock in 1874, which marked a significant advancement in security technology. The company has since evolved into a major player in the security hardware industry,
known for its high-security products and innovations.
This lock, made in 2016 is probably from salvage, and is now a demonstration model. It is a 4 wheel model and has a 8 digit combination such as 10-20-30-40. 100 million different combinations can be set.
When I worked in a bank we had similar locks on the vaults. Each vault would have two different combination locks and two staff would only know one of the combinations. Therefore two staff would each unlock their
combination independently before the next stage of unlocking to key locks on the safe principle.