The Seiko 5421-5040 is a watch model based on the 5421 movement.
Parts List
| SA7N20GN00 | crystal - crystal |
| 35M94NA1 | crown |
| 0G1900N01 | case back gasket - case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| PK64A | band - band |
| 08SC14NG | others - second hand |
| 08T02NGH | others - hour hand |
| 08T02NGM | others - minute hand |
| A120BS | others - push pin (for lb) |
| 54210140XS14 | others - dial |
| 54211 | others - machine code |
| 542150402N | others - case |
| 82705160 | others - case ring |
| 0354705 | others - winding stem |
Caliber 5421
