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

ECS Other Clocks

English Clock Systems Ltd. sold other clocks that were not master clocks:

 

So far, only few have come to light. One example is a quartz clock with a mechanical digital display.
Click on Quartz wall clock on the left for full details

 

 

Another is a range of synchronous wall clocks.
Click on Synchronous Clock on the left for more details.