The Seiko 4N20-0440 is a watch model based on the 4N20 movement.
Parts List
| 160A02JN02 | crystal - crystal (inorganic) |
| 30M57NN1 | crown - crown |
| AC004BA11 | case back gasket - crown and stem gasket |
| HC08A | band - band |
| 4N20044026 | others - case |
| 4N200440 | others - case back |
| 4N200730XG19 | others - dial |
| 4N2061 | others - machine code |
| 0351155 | others - winding stem |
| 82841070 | others - case ring |
| 06Y19AGM | others - minute hand |
| 06Y19AGH | others - hour hand |