The Seiko 4N21-5340 is a watch model based on the 4N21 movement.
Parts List
| RE3A99SN01 | crystal - crystal |
| 6M35B7SNG1 | crown - crown |
| 6M35B7SNW1 | crown - crown |
| 0F190BA1S | case back gasket - case back gasket |
| DC28AB | band - band |
| DC29AB | band - band |
| DC27BB | band - band |
| 1BA040A1BAK | others - hour hand |
| 2BA060A1BAK | others - minute hand |
| 3BA075F1BA6 | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 4N21534075A | others - case |
| 82836170 | others - case ring |
| 4N215340 | others - case back |
| 4N2153407EA | others - case |
| 4N2153407LA | others - case |
| 4N212230XS14 | others - dial |
| 4N2165 | others - machine code |
| A140AS | others - push pin |