Wall Clock Governor Driver

Wall Clock Governor Drivers – These were common
before the advent of quartz controlled stepping motor clocks
Here is a reverse engineered diagram of this very typical circuit:
Coil detail : 54.5mH with CT open air.Q1 Transistor motorola silicon TJ210 ,

Source:

http://www.members.shaw.ca/novotill/ClockGovernorDrives/index.htm