The Seiko 1E20-5689 is a watch model based on the 1E20 movement.
Parts List
| REAN16JN | crystal |
| REAN16JN01 | crystal - crystal (inorganic) |
| 30M68NA1 | crown - crown |
| 0H1300N01 | case back gasket |
| 0H1300N0 | case back gasket |
| DZ0041B0 | case back gasket |
| E5012G | band - metal band |
| E5012G-BK4G | clasp - buckle |
| E5012G-PB1 | clasp - parts for buckle/clasp |
| 03V08DGH | others - hour hand |
| 0351931 | others - winding stem |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 1E201140XG14 | others - dial |
| 1E201150XB14 | others - dial |
| 1E205689 | others - case back |
| 1E20568925 | others - case |
| 1E208 | others - machine code |
| 82801460 | others - case ring |
| 0354930 | others - winding stem |
| 03V08DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
