The Relyon logo used by English Clock Systems Ltd and its predecessor, Synchro Time Systems Ltd

ECS Master Clocks

English Clock Systems Ltd. made two different master clock designs:

The first, designed in the 1930s by Synchro Time Systems Ltd (the company that became ECS), used a one-second pendulum.

Click on 1-Second Master on the left for full details of the clocks, and on Owners Manual for manufacturer's installation instructions, and Set-up Notes for detailed setting up instructions.

The second master clock, designed in conjunction with Gents of Leicester in the 1960s, had a half-second pendulum, was powered by mains AC power, and employed a mechanical memory system to overcome the problems of power failures.

Click on Memory Master on the left for details.

With the advent of Quartz timekeeping, English Clock Systems Ltd. bought master clocks from Patek Philippe, and badged them as ECS clocks. Click on Quartz-M Master on the left for more details.