The Seiko 4N21-1030 is a watch model based on the 4N21 movement.
Parts List
| 180W69SN02 | crystal - crystal |
| 6M30A3NNG4 | crown - crown |
| 0F160BA1S | case back gasket - case back gasket |
| D0S9AZ | band - band |
| D0S9CZ | band - band |
| 3BA075F1BNG | others - second hand |
| 2BB072A1BNG | others - minute hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 81604259 | others - bracelet fixing pin |
| 81190875 | others - bracelet fixing pipe |
| 81190155 | others - bracelet fixing pipe |
| 82833515 | others - case ring |
| 4N21103079A | others - case |
| 81604069 | others - bracelet fixing pin |
| 4N211030 | others - case back |
| 4N211030T8A | others - case |
| 4N212220XS14 | others - dial |
| 4N212220XS24 | others - dial |
| 4N2164 | others - machine code |
| 1BB050A1BNG | others - hour hand |