The Seiko 1E20-3C50 is a watch model based on the 1E20 movement.
Parts List
| SA1A64JR02 | crystal - crystal |
| 6M30B9SNG1 | crown - crown |
| 6M30B9SNW0 | crown - crown |
| 0F130BA1S | case back gasket - case back gasket |
| 0F130NA1S | case back gasket - case back gasket |
| D145AQ | band - band |
| D145FQ | band - band |
| 04VC6DGH | others - hour hand |
| 04VC6DGM | others - minute hand |
| 04VC6DSH | others - hour hand |
| 04VC6DSM | others - minute hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1E203C5075 | others - case |
| 82839460 | others - case ring |
| 1E203C50 | others - case back |
| 1E203C507E | others - case |
| 1E205C60XA14 | others - dial |
| 1E205C60XA23 | others - dial |
| 1E207 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |
| 0351931 | others - winding stem |
Caliber 1E20
