Manufacturer - Sargent & Greenleaf
Dates of patent: 1875 -1877
Date of Manufacturing: Early 1900's Number of movements: 1. 72 hours.
This Timelock was used by Mosler on it's Corliss Safes. Each safe had 2 of the locks.
The use of a single clock was limiting and soon gave way to the introduction of 2,3 and 4 movements with increased time spans.