The Seiko 1E20-5B10 is a watch model based on the 1E20 movement.
Parts List
| K00A15SN01 | crystal |
| 25M69DX1 | crown |
| 25M69DX1C | crown |
| 0H1100N01 | case back gasket |
| 03L09JZH | others - hour hand |
| 03V09JZM | others - minute hand |
Caliber 1E20
Seiko 1E20-5B10 Watch Guide