The Seiko 1E20-5890 is a watch model based on the 1E20 movement.
Parts List
| REBN26JN01 | crystal - crystal (inorganic) |
| 30M98NA1 | crown |
| 0H1300N01 | case back gasket |
| M5042G | band - metal band |
| M5042S | band - metal band |
| M5042G-BK3G | clasp - buckle |
| 03V12DGH | others - hour hand |
| 03V12DGM | others - minute hand |
| 0351931 | others - winding stem |
| 03V06NGH | others - hour hand |
| T070AS | others - push pin |
| 1E201530XG14 | others - dial |
| 1E201530XN14 | others - dial |
| 1E201540XB14 | others - dial |
| 1E205890 | others - case back |
| 1E20589025 | others - case |
| 1E2058902N | others - case |
| 1E208 | others - machine code |
| 82801460 | others - case ring |
| DZ0041B01 | others - crown and stem gasket |
| 03V20DGM | others - minute hand |
Caliber 1E20
