The Seiko 1E20-3C60 is a watch model based on the 1E20 movement.
Parts List
| K01A50JR02 | crystal - crystal |
| 6M30B9SNG1 | crown - crown |
| 6M30B9SNW0 | crown - crown |
| 0F130NA1S | case back gasket - case back gasket |
| D146AQ-LK00 | band - link |
| D146AQ | band - band |
| D146FQ | band - band |
| 04V32DAM | others - minute hand |
| 1CF032L0BDG | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 1E203C6075 | others - case |
| 82839540 | others - case ring |
| 1E203C60 | others - case back |
| 1E203C607E | others - case |
| 1E205C70XA14 | others - dial |
| 1E205C70XA24 | others - dial |
| 1E207 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |
| 0351931 | others - winding stem |
Caliber 1E20
