The Seiko 4N21-0930 is a watch model based on the 4N21 movement.
Parts List
| 155A07JN02 | crystal - crystal |
| 6M30B9NNG0 | crown - crown |
| 0F140BA1S | case back gasket - case back gasket |
| D0A9DQ | band - band |
| 3BA075F1BNG | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 06T35NGH | others - hour hand |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81606239 | others - bracelet fixing pin |
| 82833415 | others - case ring |
| 4N2109307NA | others - case |
| 4N210930 | others - case back |
| 4N211920XA19 | others - dial |
| 4N2164 | others - machine code |
| 06T35NGM | others - minute hand |