The Seiko 5421-010A is a watch model based on the 5421 movement.
Parts List
| 270W16GN00 | crystal - crystal |
| 35M82NS1 | crown - crown |
| 0H2520N01 | case back gasket - case back gasket |
| 86565040 | crystal gasket - plastic gasket for crystal |
| YN01A | band - band |
| 89900863 | band - other |
| 89900883 | band - other |
| 89900920 | band - other |
| 89900969 | band - other |
| 89901009 | band - other |
| 89901789 | band - other |
| 11T12NBM | others - minute hand |
| 11T24NBH | others - hour hand |
| 0354707 | others - winding stem |
| 82707080 | others - case ring |
| 5421010A61 | others - case |
| 54210500XS19 | others - dial |
| 54211 | others - machine code |
| 81331488 | others - open-close spring |
| 81501629 | others - screw |
| 81870769 | others - case bow |
| 13SC04AB | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
Caliber 5421
