This is an interesting example of a Sargent & Greenleaf model B timelock. It was made circa 1895 - 1898 but was not used until it was fitted to a Chubb strongroom which was exhibited in Paris in 1904 and subsequently purchased by an English bank.

S&G model B timelock.-sv300025.jpg

The internal decoration is indicative of the earlier date. The Chubb plate is not original, the Sargent & Greenleaf plate has been removed and replaced as Chubb's hated to use a lock with another makers name. Unlike the earlier and larger locks the modular movement design has been adopted, allowing individual movements to be removed for service.

S&G model B timelock.-sv300024.jpg

My thanks to John Errol for his assistance in dating this lock.