The Seiko 3421-5340 is a watch model based on the 3421 movement.
Parts List
| K01N02GN00 | crystal |
| 35M94NA1 | crown |
| 0A1900N01 | case back gasket - case back gasket |
| 0G0055B01 | case back gasket - crown and stem gasket |
| KL16A | band - band |
| KL17A | band - band |
| 08SC14NG | others - second hand |
| 08T02NGH | others - hour hand |
| 08T02NGM | others - minute hand |
| A120BS | others - push pin (for lb) |
| 34210760XS14 | others - dial |
| 34210760XY14 | others - dial |
| 34211 | others - machine code |
| 3421534025 | others - case |
| 82702840 | others - case ring |
| 0354546 | others - winding stem |
Caliber 3421
