These are just a few of the more significant milestones in the development of Electrical Horology.
| 1840 | First practical electromagnetic clock, by Alexander Bain. |
| 1864 | Distribution of time to public clocks, by Magnetic Telegraph Co, Glasgow. |
| 1881 | Electric motor to wind clock spring, by Chester H. Ponds, (USA). |
| 1906 | Eureka, first successful balance wheel electric clock, by T. B. Powers (Patented by Kutnow Bros). |
| 1918 | Synchronous electric clock invented (A.C. mains powered), by Henry Ellis Warren (USA). |
| 1927 | Quartz crystal controlled clock invented (experimental design), by Warren A. Marrison. |
| 1931 | Synclock: one of the first domestic synchronous clocks for the UK (Warren motor, A.C. mains powered), by Everett, Edgcumbe & Co. |
| 1933 | Speaking clock: the first accurate fully automatic service, Paris. |
| 1953 | Transistor first used to electronically maintain a pendulum, by Leon Hâtot (France). |
| 1955 | Caesium atomic clock, by Louis Essen. |
| 1957 | Wrist watch with electrical contacts operated directly by balance wheel produced commercially, by Hamilton Watch Co (US). |
| 1959 | Accutron watch using an electronically maintained tuning fork as timing element, by Bulova. |
| 1970 | First LED display on a wrist watch. |
| 1971 | First LCD display on a wrist watch. |
| 1972 | First mass produced domestic quartz clock, by Staiger in Germany. |