The Seiko 1E20-5090 is a watch model based on the 1E20 movement.
Parts List
| K02N02GN00 | crystal - crystal (inorganic) |
| 30M54NA1 | crown |
| 0H1300N01 | case back gasket |
| B5172G | band - metal band |
| B5172G-BK3G | clasp - buckle |
| 1E200190XG14 | others - dial |
| 1E20509025 | others - case |
| 1E208 | others - machine code |
| 82722220 | others - case ring |
| B090AS | others - push pin |
| 0351931 | others - winding stem |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
| 04V02DGM | others - minute hand |
| 1CE030L2BDG | others - hour hand |
| 04V02DGH | others - hour hand |
Caliber 1E20
