The Seiko 5421-0040 is a watch model based on the 5421 movement.
Parts List
| 180N10GN00 | crystal - crystal |
| 35M94NA1 | crown |
| 0G0055B01 | case back gasket - crown and stem gasket |
| 0A1700N01 | case back gasket - case back gasket |
| ZK35A | band - band |
| ZK27A | band - band |
| 07SC02NG | others - second hand |
| 08T04NGH | others - hour hand |
| 07T08NGM | others - minute hand |
| A110BS | others - push pin (for mb) |
| 54210160XG14 | others - dial |
| 54210160XR14 | others - dial |
| 54211 | others - machine code |
| 542100402X | others - case |
| 82302023 | others - bezel |
| 82702340 | others - case ring |
| 0354705 | others - winding stem |
Caliber 5421
