The Seiko 4N21-0530 is a watch model based on the 4N21 movement.
Parts List
| 190P02HN03 | crystal |
| 35E57NA1 | crown |
| 0F175BAA1 | case back gasket |
| AC004BAA1 | case back gasket - crown and stem gasket |
| 86580856 | crystal gasket - plastic gasket for crystal |
| MK40F | band - leather band |
| MK41F | band - leather band |
| 3BA075F1BNG | others - second hand |
| 0351155 | others - winding stem |
| 07T35DGH | others - hour hand |
| 82833515 | others - case ring |
| 4N210530 | others - case back |
| 4N21053061 | others - case |
| 4N210530SA | others - case |
| 4N210950XL14 | others - dial |
| 4N210950XS14 | others - dial |
| 4N2164 | others - machine code |
| 81604919 | others - decorative pin |
| A130BS | others - push pin |
| 07T35DGM | others - minute hand |