The Seiko 4N21-5430 is a watch model based on the 4N21 movement.
Parts List
| RE5A27SN02 | crystal - crystal |
| 6M40B7SNW0 | crown - crown |
| 0F160BA1S | case back gasket - case back gasket |
| D158AB | band - band |
| 1BA035A1BNS | others - hour hand |
| 3BA075F1BNS | others - second hand |
| 2BA052A1BNS | others - minute hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 4N21543079A | others - case |
| 82839350 | others - case ring |
| 4N215430 | others - case back |
| 4N212570XB13 | others - dial |
| 4N212570XZ13 | others - dial |
| 4N2165 | others - machine code |
| 89942935 | others - back plate |
| A150BS | others - push pin |