The Seiko 4N00-5120 is a watch model based on the 4N00 movement.
Parts List
| SAJN39JN01 | crystal - crystal |
| SAJN39JN | crystal |
| 35ML5NN1 | crown - crown |
| 35MM3NN1 | crown |
| 0H1700B01 | case back gasket - bezel gasket |
| 0H1700B0 | case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| WGJ50G | band |
| WGJ51G | band |
| 1CE032LABDG | others - hour hand |
| 2CE050L2BDG | others - minute hand |
| 1CC040A1BAA | others - hour hand |
| 0351155 | others - winding stem |
| 82841470 | others - case ring |
| 4N000600XS19 | others - dial |
| 4N000610XS19 | others - dial |
| 4N000620XG14 | others - dial |
| 4N005120 | others - case back |
| 4N00512025 | others - case |
| 4N0061 | others - machine code |
| A110AS | others - push pin |
| 05Y03DGM | others - minute hand |
| 05Y17AGM | others - minute hand |
| 2CC055A1BAA | others - minute hand |
| 05Y15AGM | others - minute hand |
| 05Y15AGH | others - hour hand |
| 05Y17AGH | others - hour hand |
| 05Y03DGH | others - hour hand |