The Seiko 1E20-0120 is a watch model based on the 1E20 movement.
Parts List
| 100N04GN00 | crystal |
| 30M54NA1 | crown |
| 0H1000N01 | case back gasket - case back gasket |
| B5251C | band - metal band |
| B5251C-BK3G | clasp - buckle |
| 03V12DGH | others - hour hand |
| 03V12DGM | others - minute hand |
| 0351931 | others - winding stem |
| 82720980 | others - case ring |
| 1E2001202N | others - case |
| 1E200390XN14 | others - dial |
| 1E208 | others - machine code |
| B5251C-EP2 | others - endpiece |
| 0354930 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 1E20
