The Seiko 4N21-5050 is a watch model based on the 4N21 movement.
Parts List
| BA0A01SN02 | crystal |
| 25M25DA5 | crown - crown (3h) |
| 0F160BAA5 | case back gasket - case back gasket |
| MK44E | band - leather band |
| 2BF060LABDG | others - minute hand |
| A130AS | others - push pin (for lb) |
| 4N210270XG14 | others - dial |
| 4N215050 | others - case back |
| 4N2150509FA | others - case |
| 4N2164 | others - machine code |
| 82841970 | others - case ring |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 06SC19DG | others - second hand |
| 06T23JGH | others - hour hand |
| 06T23JGM | others - minute hand |