| 1881 |
Establishment by Kintaro Hattori of K. Hattori & Co., Ltd., predecessor of today's Seiko Corporation. |
| 1892 |
Foundation of Seikosha clock supply factory. Production of wall clocks begins. |
| 1895 |
Production of fob watches begins. |
| 1899 |
Production of alarm clocks begins. |
| 1902 |
Production of table clocks and musical clocks begins. |
| 1913 |
Production of the first wrist watch made in Japan begins. |
| 1917 |
K. Hattori & Co., Ltd. becomes a public company. |
| 1924 |
Seiko brand first used on watches.
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| 1937 |
Watch production split off as Daini Seikosha Co., Ltd., independent predecessor of today's Seiko Instruments Inc. |
| 1942 |
Establishment of watch producer, Daiwa Kogyo Ltd., predecessor of today's Seiko Epson Corporation. |
| 1955 |
Production of the first self-winding wrist watch made in Japan begins. |
| 1958 |
Introduction of quartz clocks for broadcasting use. |
| 1959 |
Introduction of transistorised table clocks. |
