The Seiko 5421-0120 is a watch model based on the 5421 movement.
Parts List
| 190W12GN00 | crystal |
| 35MA8NA1 | crown |
| 0A1700N01 | case back gasket - case back gasket |
| 86178940 | crystal gasket - plastic gasket for crystal |
| ZL22A | band - band |
| 08SC14NG | others - second hand |
| 08T02AGH | others - hour hand |
| 08T02AGM | others - minute hand |
| 0354705 | others - winding stem |
| 5421012075 | others - case |
| 82720760 | others - case ring |
| 54210620XS19 | others - dial |
| 54211 | others - machine code |
| A130BS | others - push pin |
| 0Z0060B01 | others - crown and stem gasket |
Caliber 5421
