The Seiko 4N21-5002 is a watch model based on the 4N21 movement.
Parts List
| ESFW11JN01 | crystal |
| 30M57NA1 | crown - crown |
| AC004BA11 | case back gasket - crown and stem gasket |
| 0F170BAA3 | case back gasket - case back gasket |
| RS07A | band - metal band |
| 3BA075F1BNG | others - second hand |
| 1BC045A1BNG | others - hour hand |
| 07SC17NG | others - second hand |
| 06T09DGH | others - hour hand |
| 4N210120XG14 | others - dial |
| 4N215002 | others - case back |
| 4N21500275 | others - case |
| 82833255 | others - case ring |
| B080AS | others - push pin |
| 06T09DGM | others - minute hand |
| 2BC065A1BDG | others - minute hand |
| 2BC075A1BNG | others - minute hand |