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

ECS - Survey of 1-second master clocks

(This is a mirror of the survey page on Martin Ridout's 'Electric Clock World' site.)

I am researching English Clock Systems Ltd one-second pendulum master clocks, and would greatly appreciate feedback from people who own, or know of, examples of these clocks. 

The purpose of the research is to correlate design changes with serial numbers, and to try to establish how serial numbers relate to dates of manufacture.

Please download the survey form as a PDF document HERE.

When completed, please email the form to the address given in the survey document. 
To fill in and save the responses in the survey document you will need the current version of Adobe Reader, available as a free download from

If you own or know of more than one clock, please Submit a separate form for each clock.

The research is on-going, so information on any examples you spot in the future will be welcome.

Thank you for your help. 
(All information supplied will be treated in strict confidence.)

The location of clocks is never requested by the survey - the only contact information required is an e-mail address.  
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