The Seiko 3421-5010 is a watch model based on the 3421 movement.
Parts List
| K00N92GN00 | crystal |
| 30M06NA1 | crown - crown |
| 30M06NS1 | crown - crown |
| 0G0055B01 | case back gasket - crown and stem gasket |
| 0H1720N01 | case back gasket - case back gasket |
| MY522 | band - band |
| MY531 | band - band |
| MY512 | band - band |
| 07T04DBH | others - hour hand |
| 07T04DBM | others - minute hand |
| 08SC14NG | others - second hand |
| 07T04DGH | others - hour hand |
| 07T04DGM | others - minute hand |
| 07T04DSH | others - hour hand |
| 07T04DSM | others - minute hand |
| 0354546 | others - winding stem |
| 83118960 | others - case ring |
| 3421501025 | others - case |
| 342100100259 | others - dial |
| 342100201143 | others - dial |
| 3421002012E4 | others - dial |
| 34211 | others - machine code |
| B090BS | others - push pin |
| 342150102E | others - case |
| 08SC14NS | others - second hand |
Caliber 3421
