The Seiko 1E20-3100 is a watch model based on the 1E20 movement.
Parts List
| K02A53JN02 | crystal - crystal |
| 6M35A9NNG1 | crown - crown |
| 6M35A9NNW0 | crown |
| 0F120BA1S | case back gasket - case back gasket |
| D101AQ | band - band |
| D101BQ | band - band |
| D101BQ-LK00 | band - link |
| 1CH027SMBDS | others - hour hand |
| 2EH040SABDG | others - minute hand |
| 2EH040SABDS | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351931 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81607519 | others - bracelet fixing pin |
| 1E20310075A | others - case |
| 82837770 | others - case ring |
| 1E203100 | others - case back |
| 1E2031007EA | others - case |
| 1E205340XS14 | others - dial |
| 1E205340XZ13 | others - dial |
| 1E208 | others - machine code |
| 1CH027SMBDG | others - hour hand |
| K02A53JN02 | crystal - crystal |
| 6M35A9NNG1 | crown - crown |
| 6M35A9NNW0 | crown |
| 0F120BA1S | case back gasket - case back gasket |
| D101AQ | band - band |
| D101BQ | band - band |
| D101BQ-LK00 | band - link |
| 1CH027SMBDS | others - hour hand |
| 2EH040SABDG | others - minute hand |
| 2EH040SABDS | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351931 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81607519 | others - bracelet fixing pin |
| 1E20310075A | others - case |
| 82837770 | others - case ring |
| 1E203100 | others - case back |
| 1E2031007EA | others - case |
| 1E205340XS14 | others - dial |
| 1E205340XZ13 | others - dial |
| 1E208 | others - machine code |
| 1CH027SMBDG | others - hour hand |
Caliber 1E20
