The Seiko 4N20-5580 is a watch model based on the 4N20 movement.
Parts List
| ES4A89JN02 | crystal - crystal |
| 6M35D5SNW0 | crown - crown |
| 6M35D5SZG0 | crown - crown |
| 6M35D5SZW0 | crown - crown |
| 0F150BA1S | case back gasket - case back gasket |
| DD41FZ | band - band |
| DD39AZ | band - band |
| DD40AZ | band - band |
| DD36AZ | band - band |
| DD37AZ | band - band |
| DD38AZ | band - band |
| WN83AZ | band - band |
| 1CC040AABNG | others - hour hand |
| 1CC040AABNS | others - hour hand |
| 0351155 | others - winding stem |
| 4N20558075A | others - case |
| 82838630 | others - case ring |
| 4N205580 | others - case back |
| 4N2055807EA | others - case |
| 4N201930XB19 | others - dial |
| 4N201930XE19 | others - dial |
| 4N201930XL19 | others - dial |
| 4N201930XN19 | others - dial |
| 4N201930XS19 | others - dial |
| 4N201930XZ19 | others - dial |
| 4N201990XB19 | others - dial |
| 4N201990XL19 | others - dial |
| 4N201990XN19 | others - dial |
| 4N2061 | others - machine code |
| A260BS | others - push pin |
| 4N2055807EB | others - case |
| DZ0040B01 | others - crown and stem gasket |
| 2CC055AABNG | others - minute hand |
| 2CC055AABNS | others - minute hand (upper) |