The Seiko 1E20-0B50 is a watch model based on the 1E20 movement.
Parts List
| 100A01SN02 | crystal - crystal |
| 100N11SN01 | crystal - crystal |
| 25N09DE1 | crown |
| 0D100NA11 | case back gasket - case back gasket |
| 04L05DGH | others - hour hand |
| 82722960 | others - case ring |
| 1E200B5043 | others - case |
| 1E200E40XA1Z | others - dial |
| DZ0040B01 | others - crown and stem gasket |
| 0354930 | others - winding stem |
| 04V13DGM | others - minute hand |
Caliber 1E20
