The Seiko 4N20-0280 is a watch model based on the 4N20 movement.
Parts List
| 170A05SR0A | crystal - crystal |
| 30M71NA4 | crown |
| 0F150BAA5 | case back gasket - case back gasket |
| HK16C | band - leather band |
| 07Y15VGM | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 82841070 | others - case ring |
| 82361135 | others - bezel |
| 4N200280 | others - case back |
| 4N2002805WA | others - case |
| 4N200500XS14 | others - dial |
| 4N2061 | others - machine code |
| A120AS | others - push pin |
| 07Y69VCH | others - hour hand |